Commit mzla patches

moz/comm/TOP-UNFINISHED-buoy.patch

@@ -0,0 +1,3168 @@
+# HG changeset patch
+# User Matt A. Tobin <email@mattatobin.com>
+# Date 1722343300 18000
+#      Tue Jul 30 07:41:40 2024 -0500
+# Node ID 04b7b3fda5f991ce0913f3391a57d9839f946fe8
+# Parent  56357ac123e4f2989867d6fa59e18f93215efa08
+No Bug - Adapt a new component so that SeaMonkey can run.
+
+diff --git a/suite/branding/seamonkey/locales/en-US/brand.ftl b/suite/branding/seamonkey/locales/en-US/brand.ftl
+new file mode 100644
+--- /dev/null
++++ b/suite/branding/seamonkey/locales/en-US/brand.ftl
+@@ -0,0 +1,21 @@
++# This Source Code Form is subject to the terms of the Mozilla Public
++# License, v. 2.0. If a copy of the MPL was not distributed with this
++# file, You can obtain one at http://mozilla.org/MPL/2.0/.
++
++## SeaMonkey Brand
++##
++## SeaMonkey must be treated as a brand, and kept in English.
++## It cannot be:
++## - Transliterated.
++## - Translated.
++##
++## Reference: https://www.mozilla.org/styleguide/communications/translation/
++
++-brand-shorter-name = SeaMonkey
++-brand-short-name = SeaMonkey
++-brand-full-name = SeaMonkey
++# This brand name can be used in messages where the product name needs to
++# remain unchanged across different versions (Daily, Beta, etc.).
++-brand-product-name = SeaMonkey
++-vendor-short-name = SeaMonkey e.V.
++trademarkInfo = { " " }
+diff --git a/suite/branding/seamonkey/locales/jar.mn b/suite/branding/seamonkey/locales/jar.mn
+--- a/suite/branding/seamonkey/locales/jar.mn
++++ b/suite/branding/seamonkey/locales/jar.mn
+@@ -1,6 +1,9 @@
+ #filter substitution
+ 
++[localization] @AB_CD@.jar:
++  branding                                 (en-US/**/*.ftl)
++
+ @AB_CD@.jar:
+ % locale branding @AB_CD@ %locale/@AB_CD@/branding/
+   locale/@AB_CD@/branding/brand.dtd        (%brand.dtd)
+   locale/@AB_CD@/branding/brand.properties (%brand.properties)
+diff --git a/suite/buoy/ATTN-CC-SUITE-PATCHERS.txt b/suite/buoy/ATTN-CC-SUITE-PATCHERS.txt
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/ATTN-CC-SUITE-PATCHERS.txt
+@@ -0,0 +1,3 @@
++Please exclude this component from any scripted or manual upgrades to the rest
++of the suite (unless you are specifically updating this component).
++It's handling is a special case and should be done seperately.
+\ No newline at end of file
+diff --git a/suite/buoy/ATTN-L10N-TRANSLATORS.txt b/suite/buoy/ATTN-L10N-TRANSLATORS.txt
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/ATTN-L10N-TRANSLATORS.txt
+@@ -0,0 +1,3 @@
++This component can be ignored and does not need to be translated. Its only
++purpose is to faciliate SeaMonkey Reconstruction as well as specific
++testing cases.
+\ No newline at end of file
+diff --git a/suite/buoy/ZZ-buoy-prefs.js b/suite/buoy/ZZ-buoy-prefs.js
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/ZZ-buoy-prefs.js
+@@ -0,0 +1,2 @@
++//pref("toolkit.defaultChromeURI", "chrome://buoy/content/buoy.xhtml");
++pref("prompts.contentPromptSubDialog", false);
+diff --git a/suite/buoy/content/buoy.css b/suite/buoy/content/buoy.css
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/content/buoy.css
+@@ -0,0 +1,9 @@
++/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++html, body {
++  height: 100%;
++}
++
+diff --git a/suite/buoy/content/buoy.js b/suite/buoy/content/buoy.js
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/content/buoy.js
+@@ -0,0 +1,37 @@
++/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++var { EzE10SUtils } = ChromeUtils.import("resource:///modules/EzE10SUtils.jsm");
++
++ChromeUtils.defineESModuleGetters(this, {
++  BrowserToolboxLauncher: "resource://devtools/client/framework/browser-toolbox/Launcher.sys.mjs",
++});
++
++Object.defineProperty(this, "BrowserConsoleManager", {
++  get() {
++    let { loader } = ChromeUtils.importESModule("resource://devtools/shared/loader/Loader.sys.mjs");
++    return loader.require("devtools/client/webconsole/browser-console-manager").BrowserConsoleManager;
++  },
++  configurable: true,
++  enumerable: true,
++});
++
++var MainBuoyFunctions = {
++  startup: function() {
++    var browser = document.getElementById("main-browser");
++    var homepage = "about:config";
++    EzE10SUtils.loadAboutBlank(browser);
++    EzE10SUtils.loadURI(browser, homepage);
++  },
++  openURL: function(aURL) {
++    EzE10SUtils.loadURI(document.getElementById("main-browser"), aURL);
++  },
++  devtools: function() { BrowserToolboxLauncher.init(); },
++  quitApp: function() { Services.startup.quit(Services.startup.eAttemptQuit); },
++}
++
++function openWebLinkIn(url, where, params) {
++  MainBuoyFunctions.openURL(url);
++}
+diff --git a/suite/buoy/content/buoy.xhtml b/suite/buoy/content/buoy.xhtml
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/content/buoy.xhtml
+@@ -0,0 +1,65 @@
++<?xml version="1.0"?>
++<!-- This Source Code Form is subject to the terms of the Mozilla Public
++   - License, v. 2.0. If a copy of the MPL was not distributed with this
++   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
++
++<!--  Mozilla DocType Reference:
++      xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
++      xmlns:xbl="http://www.mozilla.org/xbl"
++      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
++      xmlns:html="http://www.w3.org/1999/xhtml"
++      xmlns:svg="http://www.w3.org/2000/svg"
++      xmlns:em="http://www.mozilla.org/2004/em-rdf#"
++-->
++
++<!DOCTYPE html>
++
++<html id="main-window"
++      xmlns="http://www.w3.org/1999/xhtml"
++      xmlns:html="http://www.w3.org/1999/xhtml"
++      xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
++      windowtype="buoy:main"
++      screenX="10"
++      screenY="10"
++      width="640px"
++      height="480px"
++      scrolling="false"
++      persist="screenX screenY width height sizemode">
++  <head>
++    <title>SeaMonkey Buoy</title>
++    <link rel="stylesheet" href="chrome://global/skin/global.css" />
++    <link rel="stylesheet" href="chrome://buoy/content/buoy.css" />
++    <script defer="defer" src="chrome://global/content/customElements.js" />
++    <script defer="defer" src="chrome://buoy/content/buoy.js" />
++    <script>
++      window.addEventListener("load", MainBuoyFunctions.startup);
++    </script>
++  </head>
++  <body xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
++
++    <commandset id="mainCommandSet">
++      <command id="cmd_Exit" oncommand="MainBuoyFunctions.quitApp();"/>
++      <command id="cmd_DevTools" oncommand="MainBuoyFunctions.devtools();"/>
++    </commandset>
++
++    <vbox flex="1">    
++      <toolbox id="buoy-toolbox">
++        <menubar id="main-menubar">
++          <menu id="file-menu" label="File">
++            <menupopup id="file-popup">
++              <menuitem label="DevTools" command="cmd_DevTools"/>
++              <menuitem label="Exit" command="cmd_Exit"/>
++            </menupopup>
++          </menu>
++        </menubar>
++      </toolbox>
++      <browser id="main-browser"
++               flex="1"
++               type="content"
++               primary="true"
++               maychangeremoteness="true"
++               nodefaultsrc="true" />
++    </vbox>
++  </body>
++</html>
++
+diff --git a/suite/buoy/devtools/all-devtools.js b/suite/buoy/devtools/all-devtools.js
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/devtools/all-devtools.js
+@@ -0,0 +1,368 @@
++// Developer Tools related preferences
++pref("devtools.chrome.enabled", true);
++pref("devtools.debugger.remote-enabled", true);
++pref("devtools.selfxss.count", 5);
++// Enable extensionStorage storage actor by default
++pref("devtools.storage.extensionStorage.enabled", true);
++
++// Toolbox preferences
++pref("devtools.toolbox.footer.height", 250);
++pref("devtools.toolbox.sidebar.width", 500);
++pref("devtools.toolbox.host", "bottom");
++pref("devtools.toolbox.previousHost", "right");
++pref("devtools.toolbox.selectedTool", "inspector");
++pref("devtools.toolbox.sideEnabled", true);
++pref("devtools.toolbox.zoomValue", "1");
++pref("devtools.toolbox.splitconsoleEnabled", false);
++pref("devtools.toolbox.splitconsoleHeight", 100);
++pref("devtools.toolbox.tabsOrder", "");
++pref("devtools.netmonitor.features.newEditAndResend", false);
++
++// The fission pref for enabling the "Multiprocess Browser Toolbox", which will
++// make it possible to debug anything in Firefox (See Bug 1570639 for more
++// information).
++pref("devtools.browsertoolbox.fission", true);
++
++// When the Multiprocess Browser Toolbox is enabled, you can configure the scope of it:
++// - "everything" will enable debugging absolutely everything in the browser
++//   All processes, all documents, all workers, all add-ons.
++// - "parent-process" will restrict debugging to the parent process
++//   All privileged javascript, documents and workers running in the parent process.
++pref("devtools.browsertoolbox.scope", "everything");
++
++// Toolbox Button preferences
++pref("devtools.command-button-pick.enabled", true);
++pref("devtools.command-button-frames.enabled", true);
++pref("devtools.command-button-splitconsole.enabled", true);
++pref("devtools.command-button-responsive.enabled", true);
++pref("devtools.command-button-screenshot.enabled", false);
++pref("devtools.command-button-rulers.enabled", false);
++pref("devtools.command-button-measure.enabled", false);
++pref("devtools.command-button-noautohide.enabled", false);
++pref("devtools.command-button-errorcount.enabled", true);
++  pref("devtools.command-button-experimental-prefs.enabled", true);
++
++// Inspector preferences
++// Enable the Inspector
++pref("devtools.inspector.enabled", true);
++// What was the last active sidebar in the inspector
++pref("devtools.inspector.selectedSidebar", "layoutview");
++pref("devtools.inspector.activeSidebar", "layoutview");
++pref("devtools.inspector.remote", false);
++
++// Enable the 3 pane mode in the inspector
++pref("devtools.inspector.three-pane-enabled", true);
++// Enable the 3 pane mode in the chrome inspector
++pref("devtools.inspector.chrome.three-pane-enabled", false);
++// Collapse pseudo-elements by default in the rule-view
++pref("devtools.inspector.show_pseudo_elements", false);
++// The default size for image preview tooltips in the rule-view/computed-view/markup-view
++pref("devtools.inspector.imagePreviewTooltipSize", 300);
++// Enable user agent style inspection in rule-view
++pref("devtools.inspector.showUserAgentStyles", false);
++// Show native anonymous content and user agent shadow roots
++pref("devtools.inspector.showAllAnonymousContent", false);
++// Enable the inline CSS compatibility warning in inspector rule view
++pref("devtools.inspector.ruleview.inline-compatibility-warning.enabled", false);
++// Enable the compatibility tool in the inspector.
++pref("devtools.inspector.compatibility.enabled", true);
++// Enable color scheme simulation in the inspector.
++pref("devtools.inspector.color-scheme-simulation.enabled", true);
++
++// Grid highlighter preferences
++pref("devtools.gridinspector.gridOutlineMaxColumns", 50);
++pref("devtools.gridinspector.gridOutlineMaxRows", 50);
++pref("devtools.gridinspector.showGridAreas", false);
++pref("devtools.gridinspector.showGridLineNumbers", false);
++pref("devtools.gridinspector.showInfiniteLines", false);
++// Max number of grid highlighters that can be displayed
++pref("devtools.gridinspector.maxHighlighters", 3);
++
++// Whether or not simplified highlighters should be used when
++// prefers-reduced-motion is enabled.
++pref("devtools.inspector.simple-highlighters-reduced-motion", false);
++
++// Whether or not the box model panel is opened in the layout view
++pref("devtools.layout.boxmodel.opened", true);
++// Whether or not the flexbox panel is opened in the layout view
++pref("devtools.layout.flexbox.opened", true);
++// Whether or not the flexbox container panel is opened in the layout view
++pref("devtools.layout.flex-container.opened", true);
++// Whether or not the flexbox item panel is opened in the layout view
++pref("devtools.layout.flex-item.opened", true);
++// Whether or not the grid inspector panel is opened in the layout view
++pref("devtools.layout.grid.opened", true);
++
++// Enable hovering Box Model values and jumping to their source CSS rule in the
++// rule-view.
++#if defined(NIGHTLY_BUILD)
++  pref("devtools.layout.boxmodel.highlightProperty", true);
++#else
++  pref("devtools.layout.boxmodel.highlightProperty", false);
++#endif
++
++// By how many times eyedropper will magnify pixels
++pref("devtools.eyedropper.zoom", 6);
++
++// Enable to collapse attributes that are too long.
++pref("devtools.markup.collapseAttributes", true);
++// Length to collapse attributes
++pref("devtools.markup.collapseAttributeLength", 120);
++// Whether to auto-beautify the HTML on copy.
++pref("devtools.markup.beautifyOnCopy", false);
++// Whether or not the DOM mutation breakpoints context menu are enabled in the
++// markup view.
++pref("devtools.markup.mutationBreakpoints.enabled", true);
++
++// DevTools default color unit
++pref("devtools.defaultColorUnit", "authored");
++
++// Enable the Memory tools
++pref("devtools.memory.enabled", true);
++
++pref("devtools.memory.custom-census-displays", "{}");
++pref("devtools.memory.custom-label-displays", "{}");
++pref("devtools.memory.custom-tree-map-displays", "{}");
++
++pref("devtools.memory.max-individuals", 1000);
++pref("devtools.memory.max-retaining-paths", 10);
++
++// Enable the Performance tools
++pref("devtools.performance.enabled", true);
++// But not the pop-up.
++pref("devtools.performance.popup.feature-flag", false);
++// Override the default preset, which is "web-developer" on beta and release.
++pref("devtools.performance.recording.preset", "firefox-platform");
++pref("devtools.performance.recording.preset.remote", "firefox-platform");
++
++// The default cache UI setting
++pref("devtools.cache.disabled", false);
++
++// The default service workers UI setting
++pref("devtools.serviceWorkers.testing.enabled", false);
++
++// Enable the Network Monitor
++pref("devtools.netmonitor.enabled", true);
++
++pref("devtools.netmonitor.features.search", true);
++pref("devtools.netmonitor.features.requestBlocking", true);
++
++// Enable the Application panel
++pref("devtools.application.enabled", false);
++
++// Enable the custom formatters feature
++// This preference represents the user's choice to enable the custom formatters feature.
++// While the preference above will be removed once the feature is stable, this one is menat to stay.
++pref("devtools.custom-formatters.enabled", false);
++
++// The default Network Monitor UI settings
++pref("devtools.netmonitor.panes-network-details-width", 550);
++pref("devtools.netmonitor.panes-network-details-height", 450);
++pref("devtools.netmonitor.panes-search-width", 550);
++pref("devtools.netmonitor.panes-search-height", 450);
++pref("devtools.netmonitor.filters", "[\"all\"]");
++pref("devtools.netmonitor.visibleColumns",
++  "[\"status\",\"method\",\"domain\",\"file\",\"initiator\",\"type\",\"transferred\",\"contentSize\",\"waterfall\"]"
++);
++pref("devtools.netmonitor.columnsData",
++  '[{"name":"status","minWidth":30,"width":5}, {"name":"method","minWidth":30,"width":5}, {"name":"domain","minWidth":30,"width":10}, {"name":"file","minWidth":30,"width":25}, {"name":"url","minWidth":30,"width":25},{"name":"initiator","minWidth":30,"width":10},{"name":"type","minWidth":30,"width":5},{"name":"transferred","minWidth":30,"width":10},{"name":"contentSize","minWidth":30,"width":5},{"name":"waterfall","minWidth":150,"width":15}]');
++pref("devtools.netmonitor.msg.payload-preview-height", 128);
++pref("devtools.netmonitor.msg.visibleColumns",
++  '["data", "time"]'
++);
++pref("devtools.netmonitor.msg.displayed-messages.limit", 500);
++
++pref("devtools.netmonitor.response.ui.limit", 10240);
++
++// Save request/response bodies yes/no.
++pref("devtools.netmonitor.saveRequestAndResponseBodies", true);
++
++// The default Network monitor HAR export setting
++pref("devtools.netmonitor.har.defaultLogDir", "");
++pref("devtools.netmonitor.har.defaultFileName", "%hostname_Archive [%date]");
++pref("devtools.netmonitor.har.jsonp", false);
++pref("devtools.netmonitor.har.jsonpCallback", "");
++pref("devtools.netmonitor.har.includeResponseBodies", true);
++pref("devtools.netmonitor.har.compress", false);
++pref("devtools.netmonitor.har.forceExport", false);
++pref("devtools.netmonitor.har.pageLoadedTimeout", 1500);
++pref("devtools.netmonitor.har.enableAutoExportToFile", false);
++
++pref("devtools.netmonitor.features.webSockets", true);
++
++// netmonitor audit
++pref("devtools.netmonitor.audits.slow", 500);
++
++// Disable the EventSource Inspector.
++pref("devtools.netmonitor.features.serverSentEvents", false);
++
++// Enable the Storage Inspector
++pref("devtools.storage.enabled", true);
++
++// Enable the Style Editor.
++pref("devtools.styleeditor.enabled", true);
++pref("devtools.styleeditor.autocompletion-enabled", true);
++pref("devtools.styleeditor.showMediaSidebar", true);
++pref("devtools.styleeditor.mediaSidebarWidth", 238);
++pref("devtools.styleeditor.navSidebarWidth", 245);
++pref("devtools.styleeditor.transitions", true);
++
++// Screenshot Option Settings.
++pref("devtools.screenshot.clipboard.enabled", false);
++pref("devtools.screenshot.audio.enabled", true);
++
++// Make sure the DOM panel is hidden by default
++pref("devtools.dom.enabled", false);
++
++// Enable the Accessibility panel.
++pref("devtools.accessibility.enabled", true);
++
++// Web console filters
++pref("devtools.webconsole.filter.error", true);
++pref("devtools.webconsole.filter.warn", true);
++pref("devtools.webconsole.filter.info", true);
++pref("devtools.webconsole.filter.log", true);
++pref("devtools.webconsole.filter.debug", true);
++pref("devtools.webconsole.filter.css", false);
++pref("devtools.webconsole.filter.net", false);
++pref("devtools.webconsole.filter.netxhr", false);
++
++// Webconsole autocomplete preference
++pref("devtools.webconsole.input.autocomplete",true);
++  pref("devtools.webconsole.input.context", false);
++
++// Set to true to eagerly show the results of webconsole terminal evaluations
++// when they don't have side effects.
++pref("devtools.webconsole.input.eagerEvaluation", true);
++
++// Browser console filters
++pref("devtools.browserconsole.filter.error", true);
++pref("devtools.browserconsole.filter.warn", true);
++pref("devtools.browserconsole.filter.info", true);
++pref("devtools.browserconsole.filter.log", true);
++pref("devtools.browserconsole.filter.debug", true);
++pref("devtools.browserconsole.filter.css", false);
++pref("devtools.browserconsole.filter.net", false);
++pref("devtools.browserconsole.filter.netxhr", false);
++
++// Max number of inputs to store in web console history.
++pref("devtools.webconsole.inputHistoryCount", 300);
++
++// Persistent logging: |true| if you want the relevant tool to keep all of the
++// logged messages after reloading the page, |false| if you want the output to
++// be cleared each time page navigation happens.
++pref("devtools.webconsole.persistlog", false);
++pref("devtools.netmonitor.persistlog", false);
++
++// Web Console timestamp: |true| if you want the logs and instructions
++// in the Web Console to display a timestamp, or |false| to not display
++// any timestamps.
++pref("devtools.webconsole.timestampMessages", false);
++
++// Enable the webconsole sidebar toggle in Nightly builds.
++  pref("devtools.webconsole.sidebarToggle", false);
++
++// Saved editor mode state in the console.
++pref("devtools.webconsole.input.editor", false);
++pref("devtools.browserconsole.input.editor", false);
++
++// Editor width for webconsole and browserconsole.
++pref("devtools.webconsole.input.editorWidth", 0);
++pref("devtools.browserconsole.input.editorWidth", 0);
++
++// Display an onboarding UI for the Editor mode.
++pref("devtools.webconsole.input.editorOnboarding", true);
++
++// Enable message grouping in the console, true by default
++pref("devtools.webconsole.groupWarningMessages", true);
++
++// Saved state of the Display content messages checkbox in the browser console.
++pref("devtools.browserconsole.contentMessages", true);
++
++// Enable network monitoring the browser toolbox console/browser console.
++pref("devtools.browserconsole.enableNetworkMonitoring", false);
++
++// Enable client-side mapping service for source maps
++pref("devtools.source-map.client-service.enabled", true);
++
++// The number of lines that are displayed in the web console.
++pref("devtools.hud.loglimit", 10000);
++
++// The developer tools editor configuration:
++// - tabsize: how many spaces to use when a Tab character is displayed.
++// - expandtab: expand Tab characters to spaces.
++// - keymap: which keymap to use (can be 'default', 'emacs' or 'vim')
++// - autoclosebrackets: whether to permit automatic bracket/quote closing.
++// - detectindentation: whether to detect the indentation from the file
++// - enableCodeFolding: Whether to enable code folding or not.
++pref("devtools.editor.tabsize", 2);
++pref("devtools.editor.expandtab", true);
++pref("devtools.editor.keymap", "default");
++pref("devtools.editor.autoclosebrackets", true);
++pref("devtools.editor.detectindentation", true);
++pref("devtools.editor.enableCodeFolding", true);
++pref("devtools.editor.autocomplete", true);
++
++// The angle of the viewport.
++pref("devtools.responsive.viewport.angle", 0);
++// The width of the viewport.
++pref("devtools.responsive.viewport.width", 320);
++// The height of the viewport.
++pref("devtools.responsive.viewport.height", 480);
++// The pixel ratio of the viewport.
++pref("devtools.responsive.viewport.pixelRatio", 0);
++// Whether or not the viewports are left aligned.
++pref("devtools.responsive.leftAlignViewport.enabled", false);
++// Whether to reload when touch simulation is toggled
++pref("devtools.responsive.reloadConditions.touchSimulation", false);
++// Whether to reload when user agent is changed
++pref("devtools.responsive.reloadConditions.userAgent", false);
++// Whether to show the notification about reloading to apply emulation
++pref("devtools.responsive.reloadNotification.enabled", true);
++// Whether or not touch simulation is enabled.
++pref("devtools.responsive.touchSimulation.enabled", false);
++// The user agent of the viewport.
++pref("devtools.responsive.userAgent", "");
++
++// Show the custom user agent input in Nightly builds.
++#if defined(NIGHTLY_BUILD)
++  pref("devtools.responsive.showUserAgentInput", true);
++#else
++  pref("devtools.responsive.showUserAgentInput", false);
++#endif
++
++// Show tab debug targets for This Firefox (on by default for local builds).
++  pref("devtools.aboutdebugging.local-tab-debugging", true);
++
++// Show process debug targets.
++pref("devtools.aboutdebugging.process-debugging", true);
++// Stringified array of network locations that users can connect to.
++pref("devtools.aboutdebugging.network-locations", "[]");
++// Debug target pane collapse/expand settings.
++pref("devtools.aboutdebugging.collapsibilities.installedExtension", false);
++pref("devtools.aboutdebugging.collapsibilities.otherWorker", false);
++pref("devtools.aboutdebugging.collapsibilities.serviceWorker", false);
++pref("devtools.aboutdebugging.collapsibilities.sharedWorker", false);
++pref("devtools.aboutdebugging.collapsibilities.tab", false);
++pref("devtools.aboutdebugging.collapsibilities.temporaryExtension", false);
++
++// about:debugging: only show system and hidden extensions in local builds by
++// default.
++  pref("devtools.aboutdebugging.showHiddenAddons", true);
++
++// Map top-level await expressions in the console
++pref("devtools.debugger.features.map-await-expression", true);
++
++// This relies on javascript.options.asyncstack as well or it has no effect.
++pref("devtools.debugger.features.async-captured-stacks", true);
++pref("devtools.debugger.features.async-live-stacks", false);
++
++// Disable autohide for DevTools popups and tooltips.
++// This is currently not exposed by any UI to avoid making
++// about:devtools-toolbox tabs unusable by mistake.
++pref("devtools.popup.disable_autohide", false);
++
++// Enable overflow debugging in the inspector.
++pref("devtools.overflow.debugging.enabled", true);
++// Enable drag to edit properties in the inspector rule view.
++pref("devtools.inspector.draggable_properties", true);
+diff --git a/suite/buoy/devtools/components.conf b/suite/buoy/devtools/components.conf
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/devtools/components.conf
+@@ -0,0 +1,15 @@
++# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
++# vim: set filetype=python:
++# This Source Code Form is subject to the terms of the Mozilla Public
++# License, v. 2.0. If a copy of the MPL was not distributed with this
++# file, You can obtain one at http://mozilla.org/MPL/2.0/.
++
++Classes = [
++  {
++    'cid': '{089694e9-106a-4704-abf7-62a88545e194}',
++    'contract_ids': ['@xulvolution.org/generic/devtools-startup-clh;1'],
++    'esModule': 'resource:///modules/devtools-loader.sys.mjs',
++    'constructor': 'DevToolsStartup',
++    'categories': {'command-line-handler': 'm-aaa-xre-devtools'},
++  },
++]
+diff --git a/suite/buoy/devtools/devtools-loader.sys.mjs b/suite/buoy/devtools/devtools-loader.sys.mjs
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/devtools/devtools-loader.sys.mjs
+@@ -0,0 +1,118 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++const lazy = {};
++ChromeUtils.defineESModuleGetters(lazy, {
++  NetUtil: "resource://gre/modules/NetUtil.sys.mjs",
++});
++
++function resolveURIInternal(aCmdLine, aArgument) {
++  var uri = aCmdLine.resolveURI(aArgument);
++
++  if (!(uri instanceof Ci.nsIFileURL)) {
++    return uri;
++  }
++
++  try {
++    if (uri.file.exists()) {
++      return uri;
++    }
++  } catch (e) {
++    console.error(e);
++  }
++
++  // We have interpreted the argument as a relative file URI, but the file
++  // doesn't exist. Try URI fixup heuristics: see bug 290782.
++
++  try {
++    uri = Services.uriFixup.getFixupURIInfo(aArgument, 0).preferredURI;
++  } catch (e) {
++    console.error(e);
++  }
++
++  return uri;
++}
++
++export function DevToolsStartup() {}
++
++DevToolsStartup.prototype = {
++  QueryInterface: ChromeUtils.generateQI(["nsICommandLineHandler"]),
++
++  helpInfo: "",
++  handle(cmdLine) {
++    this.initialize();
++
++    // We want to overwrite the -devtools flag and open the toolbox instead
++    const devtoolsFlag = cmdLine.handleFlag("devtools", false);
++    if (devtoolsFlag) {
++      this.handleDevToolsFlag(cmdLine);
++    }
++
++    var chromeFlag = cmdLine.handleFlagWithParam("chrome", false);
++    if (chromeFlag) {
++      // The parameter specifies the window to open.
++      this.handleChromeFlag(cmdLine, chromeFlag);
++    }
++  },
++
++  handleDevToolsFlag(cmdLine) {
++    const { BrowserToolboxLauncher } = ChromeUtils.importESModule(
++      "resource://devtools/client/framework/browser-toolbox/Launcher.sys.mjs"
++    );
++    BrowserToolboxLauncher.init();
++
++    if (cmdLine.state == Ci.nsICommandLine.STATE_REMOTE_AUTO) {
++      cmdLine.preventDefault = true;
++    }
++  },
++
++  handleChromeFlag(cmdLine, chromeParam) {
++    try {
++      const argstring = Cc["@mozilla.org/supports-string;1"].createInstance(
++        Ci.nsISupportsString
++      );
++
++      const _uri = resolveURIInternal(cmdLine, chromeParam);
++
++      // only load URIs which do not inherit chrome privs
++      if (!Services.io.URIChainHasFlags(_uri, Ci.nsIProtocolHandler.URI_INHERITS_SECURITY_CONTEXT)) {
++        Services.ww.openWindow(null, _uri.spec, "_blank", "chrome,dialog=no,all", argstring);
++        cmdLine.preventDefault = true;
++      }
++    } catch (e) { dump(e); }
++  },
++
++  initialize() {
++    const { loader, require, DevToolsLoader } = ChromeUtils.importESModule(
++      "resource://devtools/shared/loader/Loader.sys.mjs"
++    );
++    const { DevToolsServer } = require("devtools/server/devtools-server");
++    const { gDevTools } = require("devtools/client/framework/devtools");
++
++    // Make sure our root actor is always registered, no matter how devtools are called.
++    const devtoolsRegisterActors =
++      DevToolsServer.registerActors.bind(DevToolsServer);
++    DevToolsServer.registerActors = function (options) {
++      devtoolsRegisterActors(options);
++      if (options.root) {
++        const {
++          createRootActor,
++        } = require("resource:///modules/devtools-root-actor.js");
++        DevToolsServer.setRootActor(createRootActor);
++      }
++    };
++
++    // Make the loader visible to the debugger by default and for the already
++    // loaded instance. Thunderbird now also provides the Browser Toolbox for
++    // chrome debugging, which uses its own separate loader instance.
++    DevToolsLoader.prototype.invisibleToDebugger = false;
++    loader.invisibleToDebugger = false;
++    DevToolsServer.allowChromeProcess = true;
++
++    // Initialize and load the toolkit/browser actors. This will also call above function to set the
++    // Thunderbird root actor
++    DevToolsServer.init();
++    DevToolsServer.registerAllActors();
++  },
++};
+diff --git a/suite/buoy/devtools/devtools-root-actor.js b/suite/buoy/devtools/devtools-root-actor.js
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/devtools/devtools-root-actor.js
+@@ -0,0 +1,67 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++/* globals loader, require, exports */
++
++/**
++ * Actors for Developer Tools.
++ */
++
++var { ActorRegistry } = require("devtools/server/actors/utils/actor-registry");
++
++loader.lazyRequireGetter(
++  this,
++  "RootActor",
++  "devtools/server/actors/root",
++  true
++);
++loader.lazyRequireGetter(
++  this,
++  "sendShutdownEvent",
++  "devtools/server/actors/webbrowser",
++  true
++);
++loader.lazyRequireGetter(
++  this,
++  "WorkerDescriptorActorList",
++  "devtools/server/actors/worker/worker-descriptor-actor-list",
++  true
++);
++loader.lazyRequireGetter(
++  this,
++  "ServiceWorkerRegistrationActorList",
++  "devtools/server/actors/worker/service-worker-registration-list",
++  true
++);
++loader.lazyRequireGetter(
++  this,
++  "ProcessActorList",
++  "devtools/server/actors/process",
++  true
++);
++
++/**
++ * Create the basic root actor for any XRE Application.
++ *
++ * @param aConnection       The debugger connection to create the actor for.
++ * @returns The actor for the connection.
++ */
++exports.createRootActor = function (aConnection) {
++  const parameters = {
++    workerList: new WorkerDescriptorActorList(aConnection, {}),
++    serviceWorkerRegistrationList: new ServiceWorkerRegistrationActorList(
++      aConnection
++    ),
++    processList: new ProcessActorList(),
++    globalActorFactories: ActorRegistry.globalActorFactories,
++    onShutdown: sendShutdownEvent,
++  };
++
++  // Create the root actor and set the application type
++  const rootActor = new RootActor(aConnection, parameters);
++  rootActor.applicationType = "generic";
++
++  return rootActor;
++};
++
+diff --git a/suite/buoy/devtools/moz.build b/suite/buoy/devtools/moz.build
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/devtools/moz.build
+@@ -0,0 +1,15 @@
++# vim: set filetype=python:
++# This Source Code Form is subject to the terms of the Mozilla Public
++# License, v. 2.0. If a copy of the MPL was not distributed with this
++# file, You can obtain one at http://mozilla.org/MPL/2.0/.
++
++EXTRA_JS_MODULES += [
++    "devtools-loader.sys.mjs",
++    "devtools-root-actor.js",
++]
++
++XPCOM_MANIFESTS += [
++    "components.conf",
++]
++
++JS_PREFERENCE_FILES += ['all-devtools.js']
+diff --git a/suite/buoy/jar.mn b/suite/buoy/jar.mn
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/jar.mn
+@@ -0,0 +1,16 @@
++# This Source Code Form is subject to the terms of the Mozilla Public
++# License, v. 2.0. If a copy of the MPL was not distributed with this
++# file, You can obtain one at http://mozilla.org/MPL/2.0/.
++
++#filter substitution
++
++buoy.jar:
++% content buoy %content/buoy/ contentaccessible=yes
++  content/buoy/buoy.css            (content/buoy.css)
++  content/buoy/buoy.js             (content/buoy.js)
++  content/buoy/buoy.xhtml          (content/buoy.xhtml)
++
++[localization] @AB_CD@.jar:
++  browser                          (moz-l10n/browser/**/*.ftl)
++  buoy                             (locale/**/*.ftl)
++
+diff --git a/suite/buoy/modules/BrowserWindowTracker.sys.mjs b/suite/buoy/modules/BrowserWindowTracker.sys.mjs
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/modules/BrowserWindowTracker.sys.mjs
+@@ -0,0 +1,6 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, you can obtain one at http://mozilla.org/MPL/2.0/. */
++
++// This module is deliberately not implemented. It only exists to keep
++// the automated tests happy. See bug 1782621.
+diff --git a/suite/buoy/modules/CustomizableUI.sys.mjs b/suite/buoy/modules/CustomizableUI.sys.mjs
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/modules/CustomizableUI.sys.mjs
+@@ -0,0 +1,360 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++// This file is a copy of a file with the same name in Firefox. Only the
++// pieces we're using, and a few pieces the devtools rely on such as the
++// constants, remain.
++
++const lazy = {};
++
++ChromeUtils.defineESModuleGetters(lazy, {
++  PanelMultiView: "resource:///modules/PanelMultiView.sys.mjs",
++});
++
++/**
++ * gPanelsForWindow is a list of known panels in a window which we may need to close
++ * should command events fire which target them.
++ */
++var gPanelsForWindow = new WeakMap();
++
++var CustomizableUIInternal = {
++  addPanelCloseListeners(aPanel) {
++    Services.els.addSystemEventListener(aPanel, "click", this, false);
++    Services.els.addSystemEventListener(aPanel, "keypress", this, false);
++    const win = aPanel.ownerGlobal;
++    if (!gPanelsForWindow.has(win)) {
++      gPanelsForWindow.set(win, new Set());
++    }
++    gPanelsForWindow.get(win).add(this._getPanelForNode(aPanel));
++  },
++
++  removePanelCloseListeners(aPanel) {
++    Services.els.removeSystemEventListener(aPanel, "click", this, false);
++    Services.els.removeSystemEventListener(aPanel, "keypress", this, false);
++    const win = aPanel.ownerGlobal;
++    const panels = gPanelsForWindow.get(win);
++    if (panels) {
++      panels.delete(this._getPanelForNode(aPanel));
++    }
++  },
++
++  handleEvent(aEvent) {
++    switch (aEvent.type) {
++      case "click":
++      case "keypress":
++        this.maybeAutoHidePanel(aEvent);
++        break;
++    }
++  },
++
++  _getPanelForNode(aNode) {
++    return aNode.closest("panel");
++  },
++
++  /*
++   * If people put things in the panel which need more than single-click interaction,
++   * we don't want to close it. Right now we check for text inputs and menu buttons.
++   * We also check for being outside of any toolbaritem/toolbarbutton, ie on a blank
++   * part of the menu.
++   */
++  _isOnInteractiveElement(aEvent) {
++    function getMenuPopupForDescendant(aNode) {
++      let lastPopup = null;
++      while (
++        aNode &&
++        aNode.parentNode &&
++        aNode.parentNode.localName.startsWith("menu")
++      ) {
++        lastPopup = aNode.localName == "menupopup" ? aNode : lastPopup;
++        aNode = aNode.parentNode;
++      }
++      return lastPopup;
++    }
++
++    let target = aEvent.target;
++    const panel = this._getPanelForNode(aEvent.currentTarget);
++    // This can happen in e.g. customize mode. If there's no panel,
++    // there's clearly nothing for us to close; pretend we're interactive.
++    if (!panel) {
++      return true;
++    }
++    // We keep track of:
++    // whether we're in an input container (text field)
++    let inInput = false;
++    // whether we're in a popup/context menu
++    let inMenu = false;
++    // whether we're in a toolbarbutton/toolbaritem
++    let inItem = false;
++    // whether the current menuitem has a valid closemenu attribute
++    let menuitemCloseMenu = "auto";
++
++    // While keeping track of that, we go from the original target back up,
++    // to the panel if we have to. We bail as soon as we find an input,
++    // a toolbarbutton/item, or the panel:
++    while (target) {
++      // Skip out of iframes etc:
++      if (target.nodeType == target.DOCUMENT_NODE) {
++        if (!target.defaultView) {
++          // Err, we're done.
++          break;
++        }
++        // Find containing browser or iframe element in the parent doc.
++        target = target.defaultView.docShell.chromeEventHandler;
++        if (!target) {
++          break;
++        }
++      }
++      const tagName = target.localName;
++      inInput = tagName == "input";
++      inItem = tagName == "toolbaritem" || tagName == "toolbarbutton";
++      const isMenuItem = tagName == "menuitem";
++      inMenu = inMenu || isMenuItem;
++
++      if (isMenuItem && target.hasAttribute("closemenu")) {
++        const closemenuVal = target.getAttribute("closemenu");
++        menuitemCloseMenu =
++          closemenuVal == "single" || closemenuVal == "none"
++            ? closemenuVal
++            : "auto";
++      }
++
++      // Keep the menu open and break out of the loop if the click happened on
++      // the ShadowRoot or a disabled menu item.
++      if (
++        target.nodeType == target.DOCUMENT_FRAGMENT_NODE ||
++        target.getAttribute("disabled") == "true"
++      ) {
++        return true;
++      }
++
++      // This isn't in the loop condition because we want to break before
++      // changing |target| if any of these conditions are true
++      if (inInput || inItem || target == panel) {
++        break;
++      }
++      // We need specific code for popups: the item on which they were invoked
++      // isn't necessarily in their parentNode chain:
++      if (isMenuItem) {
++        const topmostMenuPopup = getMenuPopupForDescendant(target);
++        target =
++          (topmostMenuPopup && topmostMenuPopup.triggerNode) ||
++          target.parentNode;
++      } else {
++        target = target.parentNode;
++      }
++    }
++
++    // If the user clicked a menu item...
++    if (inMenu) {
++      // We care if we're in an input also,
++      // or if the user specified closemenu!="auto":
++      if (inInput || menuitemCloseMenu != "auto") {
++        return true;
++      }
++      // Otherwise, we're probably fine to close the panel
++      return false;
++    }
++    // If we're not in a menu, and we *are* in a type="menu" toolbarbutton,
++    // we'll now interact with the menu
++    if (inItem && target.getAttribute("type") == "menu") {
++      return true;
++    }
++    return inInput || !inItem;
++  },
++
++  hidePanelForNode(aNode) {
++    const panel = this._getPanelForNode(aNode);
++    if (panel) {
++      lazy.PanelMultiView.hidePopup(panel);
++    }
++  },
++
++  maybeAutoHidePanel(aEvent) {
++    const eventType = aEvent.type;
++    if (eventType == "keypress" && aEvent.keyCode != aEvent.DOM_VK_RETURN) {
++      return;
++    }
++
++    if (eventType == "click" && aEvent.button != 0) {
++      return;
++    }
++
++    // We don't check preventDefault - it makes sense that this was prevented,
++    // but we probably still want to close the panel. If consumers don't want
++    // this to happen, they should specify the closemenu attribute.
++    if (eventType != "command" && this._isOnInteractiveElement(aEvent)) {
++      return;
++    }
++
++    // We can't use event.target because we might have passed an anonymous
++    // content boundary as well, and so target points to the outer element in
++    // that case. Unfortunately, this means we get anonymous child nodes instead
++    // of the real ones, so looking for the 'stoooop, don't close me' attributes
++    // is more involved.
++    let target = aEvent.originalTarget;
++    while (target.parentNode && target.localName != "panel") {
++      if (
++        target.getAttribute("closemenu") == "none" ||
++        target.getAttribute("widget-type") == "view" ||
++        target.getAttribute("widget-type") == "button-and-view"
++      ) {
++        return;
++      }
++      target = target.parentNode;
++    }
++
++    // If we get here, we can actually hide the popup:
++    this.hidePanelForNode(aEvent.target);
++  },
++};
++Object.freeze(CustomizableUIInternal);
++
++export var CustomizableUI = {
++  /**
++   * Constant reference to the ID of the navigation toolbar.
++   */
++  AREA_NAVBAR: "nav-bar",
++  /**
++   * Constant reference to the ID of the menubar's toolbar.
++   */
++  AREA_MENUBAR: "toolbar-menubar",
++  /**
++   * Constant reference to the ID of the tabstrip toolbar.
++   */
++  AREA_TABSTRIP: "TabsToolbar",
++  /**
++   * Constant reference to the ID of the bookmarks toolbar.
++   */
++  AREA_BOOKMARKS: "PersonalToolbar",
++  /**
++   * Constant reference to the ID of the non-dymanic (fixed) list in the overflow panel.
++   */
++  AREA_FIXED_OVERFLOW_PANEL: "widget-overflow-fixed-list",
++
++  /**
++   * Constant indicating the area is a menu panel.
++   */
++  TYPE_MENU_PANEL: "menu-panel",
++  /**
++   * Constant indicating the area is a toolbar.
++   */
++  TYPE_TOOLBAR: "toolbar",
++
++  /**
++   * Constant indicating a XUL-type provider.
++   */
++  PROVIDER_XUL: "xul",
++  /**
++   * Constant indicating an API-type provider.
++   */
++  PROVIDER_API: "api",
++  /**
++   * Constant indicating dynamic (special) widgets: spring, spacer, and separator.
++   */
++  PROVIDER_SPECIAL: "special",
++
++  /**
++   * Constant indicating the widget is built-in
++   */
++  SOURCE_BUILTIN: "builtin",
++  /**
++   * Constant indicating the widget is externally provided
++   * (e.g. by add-ons or other items not part of the builtin widget set).
++   */
++  SOURCE_EXTERNAL: "external",
++
++  /**
++   * Constant indicating the reason the event was fired was a window closing
++   */
++  REASON_WINDOW_CLOSED: "window-closed",
++  /**
++   * Constant indicating the reason the event was fired was an area being
++   * unregistered separately from window closing mechanics.
++   */
++  REASON_AREA_UNREGISTERED: "area-unregistered",
++
++  /**
++   * Add a widget to an area.
++   * If the area to which you try to add is not known to CustomizableUI,
++   * this will throw.
++   * If the area to which you try to add is the same as the area in which
++   * the widget is currently placed, this will do the same as
++   * moveWidgetWithinArea.
++   * If the widget cannot be removed from its original location, this will
++   * no-op.
++   *
++   * This will fire an onWidgetAdded notification,
++   * and an onWidgetBeforeDOMChange and onWidgetAfterDOMChange notification
++   * for each window CustomizableUI knows about.
++   *
++   * @param aWidgetId the ID of the widget to add
++   * @param aArea     the ID of the area to add the widget to
++   * @param aPosition the position at which to add the widget. If you do not
++   *                  pass a position, the widget will be added to the end
++   *                  of the area.
++   */
++  addWidgetToArea(aWidgetId, aArea, aPosition) {},
++  /**
++   * Remove a widget from its area. If the widget cannot be removed from its
++   * area, or is not in any area, this will no-op. Otherwise, this will fire an
++   * onWidgetRemoved notification, and an onWidgetBeforeDOMChange and
++   * onWidgetAfterDOMChange notification for each window CustomizableUI knows
++   * about.
++   *
++   * @param aWidgetId the ID of the widget to remove
++   */
++  removeWidgetFromArea(aWidgetId) {},
++  /**
++   * Get the placement of a widget. This is by far the best way to obtain
++   * information about what the state of your widget is. The internals of
++   * this call are cheap (no DOM necessary) and you will know where the user
++   * has put your widget.
++   *
++   * @param aWidgetId the ID of the widget whose placement you want to know
++   * @returns
++   *   {
++   *     area: "somearea", // The ID of the area where the widget is placed
++   *     position: 42 // the index in the placements array corresponding to
++   *                  // your widget.
++   *   }
++   *
++   *   OR
++   *
++   *   null // if the widget is not placed anywhere (ie in the palette)
++   */
++  getPlacementOfWidget(aWidgetId, aOnlyRegistered = true, aDeadAreas = false) {
++    return null;
++  },
++  /**
++   * Add listeners to a panel that will close it. For use from the menu panel
++   * and overflowable toolbar implementations, unlikely to be useful for
++   * consumers.
++   *
++   * @param aPanel the panel to which listeners should be attached.
++   */
++  addPanelCloseListeners(aPanel) {
++    CustomizableUIInternal.addPanelCloseListeners(aPanel);
++  },
++  /**
++   * Remove close listeners that have been added to a panel with
++   * addPanelCloseListeners. For use from the menu panel and overflowable
++   * toolbar implementations, unlikely to be useful for consumers.
++   *
++   * @param aPanel the panel from which listeners should be removed.
++   */
++  removePanelCloseListeners(aPanel) {
++    CustomizableUIInternal.removePanelCloseListeners(aPanel);
++  },
++  /**
++   * Notify toolbox(es) of a particular event. If you don't pass aWindow,
++   * all toolboxes will be notified. For use from Customize Mode only,
++   * do not use otherwise.
++   *
++   * @param aEvent the name of the event to send.
++   * @param aDetails optional, the details of the event.
++   * @param aWindow optional, the window in which to send the event.
++   */
++  dispatchToolboxEvent(aEvent, aDetails = {}, aWindow = null) {},
++};
++Object.freeze(CustomizableUI);
+diff --git a/suite/buoy/modules/EzE10SUtils.jsm b/suite/buoy/modules/EzE10SUtils.jsm
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/modules/EzE10SUtils.jsm
+@@ -0,0 +1,107 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, you can obtain one at http://mozilla.org/MPL/2.0/. */
++
++/**
++ * This module is assists with dealing with arbitrary browser elements
++ * in an e10s only world.
++ *
++ * This is forked from comm/mail/modules/MailE10SUtils.jsm
++ *
++ * XXXTobin: Convert to sys.mjs
++ */
++
++const EXPORTED_SYMBOLS = ["EzE10SUtils"];
++
++const { E10SUtils } = ChromeUtils.importESModule(
++  "resource://gre/modules/E10SUtils.sys.mjs"
++);
++const { ExtensionParent } = ChromeUtils.importESModule(
++  "resource://gre/modules/ExtensionParent.sys.mjs"
++);
++
++var EzE10SUtils = {
++  /**
++   * Loads about:blank in `browser` without switching remoteness. about:blank
++   * can load in a local browser or a remote browser, and `loadURI` will make
++   * it load in a remote browser even if you don't want it to.
++   *
++   * @param {nsIBrowser} browser
++   */
++  loadAboutBlank(browser) {
++    if (!browser.currentURI || browser.currentURI.spec == "about:blank") {
++      return;
++    }
++    browser.loadURI(Services.io.newURI("about:blank"), {
++      triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
++      remoteTypeOverride: browser.remoteType,
++    });
++  },
++
++  /**
++   * Loads `uri` in `browser`, changing to a remote/local browser if necessary.
++   *
++   * @see `nsIWebNavigation.loadURI`
++   *
++   * @param {nsIBrowser} browser
++   * @param {string} uri
++   * @param {object} params
++   */
++  loadURI(browser, uri, params = {}) {
++    const multiProcess = browser.ownerGlobal.docShell.QueryInterface(
++      Ci.nsILoadContext
++    ).useRemoteTabs;
++    const remoteSubframes = browser.ownerGlobal.docShell.QueryInterface(
++      Ci.nsILoadContext
++    ).useRemoteSubframes;
++
++    const isRemote = browser.getAttribute("remote") == "true";
++    const remoteType = E10SUtils.getRemoteTypeForURI(
++      uri,
++      multiProcess,
++      remoteSubframes
++    );
++    const shouldBeRemote = remoteType !== E10SUtils.NOT_REMOTE;
++
++    if (shouldBeRemote != isRemote) {
++      this.changeRemoteness(browser, remoteType);
++    }
++
++    params.triggeringPrincipal =
++      params.triggeringPrincipal ||
++      Services.scriptSecurityManager.getSystemPrincipal();
++    browser.fixupAndLoadURIString(uri, params);
++  },
++
++  /**
++   * Force `browser` to be a remote/local browser.
++   *
++   * @see E10SUtils.jsm for remote types.
++   *
++   * @param {nsIBrowser} browser - the browser to enforce the remoteness of.
++   * @param {string} remoteType - the remoteness to enforce.
++   * @returns {boolean} true if any change happened on the browser (which would
++   *    not be the case if its remoteness is already in the correct state).
++   */
++  changeRemoteness(browser, remoteType) {
++    if (browser.remoteType == remoteType) {
++      return false;
++    }
++
++    browser.destroy();
++
++    if (remoteType) {
++      browser.setAttribute("remote", "true");
++      browser.setAttribute("remoteType", remoteType);
++    } else {
++      browser.setAttribute("remote", "false");
++      browser.removeAttribute("remoteType");
++    }
++
++    browser.changeRemoteness({ remoteType });
++    browser.construct();
++    ExtensionParent.apiManager.emit("extension-browser-inserted", browser);
++
++    return true;
++  },
++};
+diff --git a/suite/buoy/modules/PanelMultiView.sys.mjs b/suite/buoy/modules/PanelMultiView.sys.mjs
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/modules/PanelMultiView.sys.mjs
+@@ -0,0 +1,1700 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++/**
++ * Allows a popup panel to host multiple subviews. The main view shown when the
++ * panel is opened may slide out to display a subview, which in turn may lead to
++ * other subviews in a cascade menu pattern.
++ *
++ * The <panel> element should contain a <panelmultiview> element. Views are
++ * declared using <panelview> elements that are usually children of the main
++ * <panelmultiview> element, although they don't need to be, as views can also
++ * be imported into the panel from other panels or popup sets.
++ *
++ * The panel should be opened asynchronously using the openPopup static method
++ * on the PanelMultiView object. This will display the view specified using the
++ * mainViewId attribute on the contained <panelmultiview> element.
++ *
++ * Specific subviews can slide in using the showSubView method, and backwards
++ * navigation can be done using the goBack method or through a button in the
++ * subview headers.
++ *
++ * The process of displaying the main view or a new subview requires multiple
++ * steps to be completed, hence at any given time the <panelview> element may
++ * be in different states:
++ *
++ * -- Open or closed
++ *
++ *    All the <panelview> elements start "closed", meaning that they are not
++ *    associated to a <panelmultiview> element and can be located anywhere in
++ *    the document. When the openPopup or showSubView methods are called, the
++ *    relevant view becomes "open" and the <panelview> element may be moved to
++ *    ensure it is a descendant of the <panelmultiview> element.
++ *
++ *    The "ViewShowing" event is fired at this point, when the view is not
++ *    visible yet. The event is allowed to cancel the operation, in which case
++ *    the view is closed immediately.
++ *
++ *    Closing the view does not move the node back to its original position.
++ *
++ * -- Visible or invisible
++ *
++ *    This indicates whether the view is visible in the document from a layout
++ *    perspective, regardless of whether it is currently scrolled into view. In
++ *    fact, all subviews are already visible before they start sliding in.
++ *
++ *    Before scrolling into view, a view may become visible but be placed in a
++ *    special off-screen area of the document where layout and measurements can
++ *    take place asynchronously.
++ *
++ *    When navigating forward, an open view may become invisible but stay open
++ *    after sliding out of view. The last known size of these views is still
++ *    taken into account for determining the overall panel size.
++ *
++ *    When navigating backwards, an open subview will first become invisible and
++ *    then will be closed.
++ *
++ * -- Active or inactive
++ *
++ *    This indicates whether the view is fully scrolled into the visible area
++ *    and ready to receive mouse and keyboard events. An active view is always
++ *    visible, but a visible view may be inactive. For example, during a scroll
++ *    transition, both views will be inactive.
++ *
++ *    When a view becomes active, the ViewShown event is fired synchronously,
++ *    and the showSubView and goBack methods can be called for navigation.
++ *
++ *    For the main view of the panel, the ViewShown event is dispatched during
++ *    the "popupshown" event, which means that other "popupshown" handlers may
++ *    be called before the view is active. Thus, code that needs to perform
++ *    further navigation automatically should either use the ViewShown event or
++ *    wait for an event loop tick, like BrowserTestUtils.waitForEvent does.
++ *
++ * -- Navigating with the keyboard
++ *
++ *    An open view may keep state related to keyboard navigation, even if it is
++ *    invisible. When a view is closed, keyboard navigation state is cleared.
++ *
++ * This diagram shows how <panelview> nodes move during navigation:
++ *
++ *   In this <panelmultiview>     In other panels    Action
++ *             ┌───┬───┬───┐        ┌───┬───┐
++ *             │(A)│ B │ C │        │ D │ E │          Open panel
++ *             └───┴───┴───┘        └───┴───┘
++ *         ┌───┬───┬───┐            ┌───┬───┐
++ *         │{A}│(C)│ B │            │ D │ E │          Show subview C
++ *         └───┴───┴───┘            └───┴───┘
++ *     ┌───┬───┬───┬───┐            ┌───┐
++ *     │{A}│{C}│(D)│ B │            │ E │              Show subview D
++ *     └───┴───┴───┴───┘            └───┘
++ *       │ ┌───┬───┬───┬───┐        ┌───┐
++ *       │ │{A}│(C)│ D │ B │        │ E │              Go back
++ *       │ └───┴───┴───┴───┘        └───┘
++ *       │   │   │
++ *       │   │   └── Currently visible view
++ *       │   │   │
++ *       └───┴───┴── Open views
++ */
++
++const lazy = {};
++
++ChromeUtils.defineLazyGetter(lazy, "gBundle", function () {
++  return Services.strings.createBundle(
++    "chrome://messenger/locale/messenger.properties"
++  );
++});
++
++/**
++ * Safety timeout after which asynchronous events will be canceled if any of the
++ * registered blockers does not return.
++ */
++const BLOCKERS_TIMEOUT_MS = 10000;
++
++const TRANSITION_PHASES = Object.freeze({
++  START: 1,
++  PREPARE: 2,
++  TRANSITION: 3,
++});
++
++const gNodeToObjectMap = new WeakMap();
++const gWindowsWithUnloadHandler = new WeakSet();
++
++/**
++ * Allows associating an object to a node lazily using a weak map.
++ *
++ * Classes deriving from this one may be easily converted to Custom Elements,
++ * although they would lose the ability of being associated lazily.
++ */
++var AssociatedToNode = class {
++  constructor(node) {
++    /**
++     * Node associated to this object.
++     */
++    this.node = node;
++
++    /**
++     * This promise is resolved when the current set of blockers set by event
++     * handlers have all been processed.
++     */
++    this._blockersPromise = Promise.resolve();
++  }
++
++  /**
++   * Retrieves the instance associated with the given node, constructing a new
++   * one if necessary. When the last reference to the node is released, the
++   * object instance will be garbage collected as well.
++   */
++  static forNode(node) {
++    let associatedToNode = gNodeToObjectMap.get(node);
++    if (!associatedToNode) {
++      associatedToNode = new this(node);
++      gNodeToObjectMap.set(node, associatedToNode);
++    }
++    return associatedToNode;
++  }
++
++  get document() {
++    return this.node.ownerDocument;
++  }
++
++  get window() {
++    return this.node.ownerGlobal;
++  }
++
++  _getBoundsWithoutFlushing(element) {
++    return this.window.windowUtils.getBoundsWithoutFlushing(element);
++  }
++
++  /**
++   * Dispatches a custom event on this element.
++   *
++   * @param  {string}    eventName Name of the event to dispatch.
++   * @param  {object}    [detail]  Event detail object. Optional.
++   * @param  {boolean}   cancelable If the event can be canceled.
++   * @returns {boolean} `true` if the event was canceled by an event handler, `false`
++   *                   otherwise.
++   */
++  dispatchCustomEvent(eventName, detail, cancelable = false) {
++    const event = new this.window.CustomEvent(eventName, {
++      detail,
++      bubbles: true,
++      cancelable,
++    });
++    this.node.dispatchEvent(event);
++    return event.defaultPrevented;
++  }
++
++  /**
++   * Dispatches a custom event on this element and waits for any blocking
++   * promises registered using the "addBlocker" function on the details object.
++   * If this function is called again, the event is only dispatched after all
++   * the previously registered blockers have returned.
++   *
++   * The event can be canceled either by resolving any blocking promise to the
++   * boolean value "false" or by calling preventDefault on the event. Rejections
++   * and exceptions will be reported and will cancel the event.
++   *
++   * Blocking should be used sporadically because it slows down the interface.
++   * Also, non-reentrancy is not strictly guaranteed because a safety timeout of
++   * BLOCKERS_TIMEOUT_MS is implemented, after which the event will be canceled.
++   * This helps to prevent deadlocks if any of the event handlers does not
++   * resolve a blocker promise.
++   *
++   * @note Since there is no use case for dispatching different asynchronous
++   *       events in parallel for the same element, this function will also wait
++   *       for previous blockers when the event name is different.
++   *
++   * @param eventName
++   *        Name of the custom event to dispatch.
++   *
++   * @resolves True if the event was canceled by a handler, false otherwise.
++   */
++  async dispatchAsyncEvent(eventName) {
++    // Wait for all the previous blockers before dispatching the event.
++    const blockersPromise = this._blockersPromise.catch(() => {});
++    return (this._blockersPromise = blockersPromise.then(async () => {
++      const blockers = new Set();
++      let cancel = this.dispatchCustomEvent(
++        eventName,
++        {
++          addBlocker(promise) {
++            // Any exception in the blocker will cancel the operation.
++            blockers.add(
++              promise.catch(ex => {
++                console.error(ex);
++                return true;
++              })
++            );
++          },
++        },
++        true
++      );
++      if (blockers.size) {
++        const timeoutPromise = new Promise((resolve, reject) => {
++          this.window.setTimeout(reject, BLOCKERS_TIMEOUT_MS);
++        });
++        try {
++          const results = await Promise.race([
++            Promise.all(blockers),
++            timeoutPromise,
++          ]);
++          cancel = cancel || results.some(result => result === false);
++        } catch (ex) {
++          console.error(
++            new Error(`One of the blockers for ${eventName} timed out.`)
++          );
++          return true;
++        }
++      }
++      return cancel;
++    }));
++  }
++};
++
++/**
++ * This is associated to <panelmultiview> elements.
++ */
++export class PanelMultiView extends AssociatedToNode {
++  /**
++   * Tries to open the specified <panel> and displays the main view specified
++   * with the "mainViewId" attribute on the <panelmultiview> node it contains.
++   *
++   * If the panel does not contain a <panelmultiview>, it is opened directly.
++   * This allows consumers like page actions to accept different panel types.
++   *
++   * @see The non-static openPopup method for details.
++   */
++  static async openPopup(panelNode, ...args) {
++    const panelMultiViewNode = panelNode.querySelector("panelmultiview");
++    if (panelMultiViewNode) {
++      return this.forNode(panelMultiViewNode).openPopup(...args);
++    }
++    panelNode.openPopup(...args);
++    return true;
++  }
++
++  /**
++   * Closes the specified <panel> which contains a <panelmultiview> node.
++   *
++   * If the panel does not contain a <panelmultiview>, it is closed directly.
++   * This allows consumers like page actions to accept different panel types.
++   *
++   * @see The non-static hidePopup method for details.
++   */
++  static hidePopup(panelNode) {
++    const panelMultiViewNode = panelNode.querySelector("panelmultiview");
++    if (panelMultiViewNode) {
++      this.forNode(panelMultiViewNode).hidePopup();
++    } else {
++      panelNode.hidePopup();
++    }
++  }
++
++  /**
++   * Removes the specified <panel> from the document, ensuring that any
++   * <panelmultiview> node it contains is destroyed properly.
++   *
++   * If the viewCacheId attribute is present on the <panelmultiview> element,
++   * imported subviews will be moved out again to the element it specifies, so
++   * that the panel element can be removed safely.
++   *
++   * If the panel does not contain a <panelmultiview>, it is removed directly.
++   * This allows consumers like page actions to accept different panel types.
++   */
++  static removePopup(panelNode) {
++    try {
++      const panelMultiViewNode = panelNode.querySelector("panelmultiview");
++      if (panelMultiViewNode) {
++        const panelMultiView = this.forNode(panelMultiViewNode);
++        panelMultiView._moveOutKids();
++        panelMultiView.disconnect();
++      }
++    } finally {
++      // Make sure to remove the panel element even if disconnecting fails.
++      panelNode.remove();
++    }
++  }
++
++  /**
++   * Ensures that when the specified window is closed all the <panelmultiview>
++   * node it contains are destroyed properly.
++   */
++  static ensureUnloadHandlerRegistered(window) {
++    if (gWindowsWithUnloadHandler.has(window)) {
++      return;
++    }
++
++    window.addEventListener(
++      "unload",
++      () => {
++        for (const panelMultiViewNode of window.document.querySelectorAll(
++          "panelmultiview"
++        )) {
++          this.forNode(panelMultiViewNode).disconnect();
++        }
++      },
++      { once: true }
++    );
++
++    gWindowsWithUnloadHandler.add(window);
++  }
++
++  get _panel() {
++    return this.node.parentNode;
++  }
++
++  set _transitioning(val) {
++    if (val) {
++      this.node.setAttribute("transitioning", "true");
++    } else {
++      this.node.removeAttribute("transitioning");
++    }
++  }
++
++  get _screenManager() {
++    if (this.__screenManager) {
++      return this.__screenManager;
++    }
++    return (this.__screenManager = Cc[
++      "@mozilla.org/gfx/screenmanager;1"
++    ].getService(Ci.nsIScreenManager));
++  }
++
++  constructor(node) {
++    super(node);
++    this._openPopupPromise = Promise.resolve(false);
++    this._openPopupCancelCallback = () => {};
++  }
++
++  connect() {
++    this.connected = true;
++
++    PanelMultiView.ensureUnloadHandlerRegistered(this.window);
++
++    const viewContainer = (this._viewContainer =
++      this.document.createXULElement("box"));
++    viewContainer.classList.add("panel-viewcontainer");
++
++    const viewStack = (this._viewStack = this.document.createXULElement("box"));
++    viewStack.classList.add("panel-viewstack");
++    viewContainer.append(viewStack);
++
++    const offscreenViewContainer = this.document.createXULElement("box");
++    offscreenViewContainer.classList.add("panel-viewcontainer", "offscreen");
++
++    const offscreenViewStack = (this._offscreenViewStack =
++      this.document.createXULElement("box"));
++    offscreenViewStack.classList.add("panel-viewstack");
++    offscreenViewContainer.append(offscreenViewStack);
++
++    this.node.prepend(offscreenViewContainer);
++    this.node.prepend(viewContainer);
++
++    this.openViews = [];
++
++    this._panel.addEventListener("popupshowing", this);
++    this._panel.addEventListener("popuppositioned", this);
++    this._panel.addEventListener("popuphidden", this);
++    this._panel.addEventListener("popupshown", this);
++
++    // Proxy these public properties and methods, as used elsewhere by various
++    // parts of the browser, to this instance.
++    ["goBack", "showSubView"].forEach(method => {
++      Object.defineProperty(this.node, method, {
++        enumerable: true,
++        value: (...args) => this[method](...args),
++      });
++    });
++  }
++
++  disconnect() {
++    // Guard against re-entrancy.
++    if (!this.node || !this.connected) {
++      return;
++    }
++
++    this._panel.removeEventListener("mousemove", this);
++    this._panel.removeEventListener("popupshowing", this);
++    this._panel.removeEventListener("popuppositioned", this);
++    this._panel.removeEventListener("popupshown", this);
++    this._panel.removeEventListener("popuphidden", this);
++    this.window.removeEventListener("keydown", this, true);
++    this.node =
++      this._openPopupPromise =
++      this._openPopupCancelCallback =
++      this._viewContainer =
++      this._viewStack =
++      this._transitionDetails =
++        null;
++  }
++
++  /**
++   * Tries to open the panel associated with this PanelMultiView, and displays
++   * the main view specified with the "mainViewId" attribute.
++   *
++   * The hidePopup method can be called while the operation is in progress to
++   * prevent the panel from being displayed. View events may also cancel the
++   * operation, so there is no guarantee that the panel will become visible.
++   *
++   * The "popuphidden" event will be fired either when the operation is canceled
++   * or when the popup is closed later. This event can be used for example to
++   * reset the "open" state of the anchor or tear down temporary panels.
++   *
++   * If this method is called again before the panel is shown, the result
++   * depends on the operation currently in progress. If the operation was not
++   * canceled, the panel is opened using the arguments from the previous call,
++   * and this call is ignored. If the operation was canceled, it will be
++   * retried again using the arguments from this call.
++   *
++   * It's not necessary for the <panelmultiview> binding to be connected when
++   * this method is called, but the containing panel must have its display
++   * turned on, for example it shouldn't have the "hidden" attribute.
++   *
++   * @param anchor
++   *        The node to anchor the popup to.
++   * @param options
++   *        Either options to use or a string position. This is forwarded to
++   *        the openPopup method of the panel.
++   * @param args
++   *        Additional arguments to be forwarded to the openPopup method of the
++   *        panel.
++   *
++   * @resolves With true as soon as the request to display the panel has been
++   *           sent, or with false if the operation was canceled. The state of
++   *           the panel at this point is not guaranteed. It may be still
++   *           showing, completely shown, or completely hidden.
++   * @rejects If an exception is thrown at any point in the process before the
++   *          request to display the panel is sent.
++   */
++  async openPopup(anchor, options, ...args) {
++    // Set up the function that allows hidePopup or a second call to showPopup
++    // to cancel the specific panel opening operation that we're starting below.
++    // This function must be synchronous, meaning we can't use Promise.race,
++    // because hidePopup wants to dispatch the "popuphidden" event synchronously
++    // even if the panel has not been opened yet.
++    let canCancel = true;
++    const cancelCallback = (this._openPopupCancelCallback = () => {
++      // If the cancel callback is called and the panel hasn't been prepared
++      // yet, cancel showing it. Setting canCancel to false will prevent the
++      // popup from opening. If the panel has opened by the time the cancel
++      // callback is called, canCancel will be false already, and we will not
++      // fire the "popuphidden" event.
++      if (canCancel && this.node) {
++        canCancel = false;
++        this.dispatchCustomEvent("popuphidden");
++      }
++    });
++
++    // Create a promise that is resolved with the result of the last call to
++    // this method, where errors indicate that the panel was not opened.
++    const openPopupPromise = this._openPopupPromise.catch(() => {
++      return false;
++    });
++
++    // Make the preparation done before showing the panel non-reentrant. The
++    // promise created here will be resolved only after the panel preparation is
++    // completed, even if a cancellation request is received in the meantime.
++    return (this._openPopupPromise = openPopupPromise.then(async wasShown => {
++      // The panel may have been destroyed in the meantime.
++      if (!this.node) {
++        return false;
++      }
++      // If the panel has been already opened there is nothing more to do. We
++      // check the actual state of the panel rather than setting some state in
++      // our handler of the "popuphidden" event because this has a lower chance
++      // of locking indefinitely if events aren't raised in the expected order.
++      if (wasShown && ["open", "showing"].includes(this._panel.state)) {
++        return true;
++      }
++      try {
++        if (!this.connected) {
++          this.connect();
++        }
++        // Allow any of the ViewShowing handlers to prevent showing the main view.
++        if (!(await this._showMainView())) {
++          cancelCallback();
++        }
++      } catch (ex) {
++        cancelCallback();
++        throw ex;
++      }
++      // If a cancellation request was received there is nothing more to do.
++      if (!canCancel || !this.node) {
++        return false;
++      }
++      // We have to set canCancel to false before opening the popup because the
++      // hidePopup method of PanelMultiView can be re-entered by event handlers.
++      // If the openPopup call fails, however, we still have to dispatch the
++      // "popuphidden" event even if canCancel was set to false.
++      try {
++        canCancel = false;
++        this._panel.openPopup(anchor, options, ...args);
++
++        // On Windows, if another popup is hiding while we call openPopup, the
++        // call won't fail but the popup won't open. In this case, we have to
++        // dispatch an artificial "popuphidden" event to reset our state.
++        if (this._panel.state == "closed" && this.openViews.length) {
++          this.dispatchCustomEvent("popuphidden");
++          return false;
++        }
++
++        if (
++          options &&
++          typeof options == "object" &&
++          options.triggerEvent &&
++          options.triggerEvent.type == "keypress" &&
++          this.openViews.length
++        ) {
++          // This was opened via the keyboard, so focus the first item.
++          this.openViews[0].focusWhenActive = true;
++        }
++
++        return true;
++      } catch (ex) {
++        this.dispatchCustomEvent("popuphidden");
++        throw ex;
++      }
++    }));
++  }
++
++  /**
++   * Closes the panel associated with this PanelMultiView.
++   *
++   * If the openPopup method was called but the panel has not been displayed
++   * yet, the operation is canceled and the panel will not be displayed, but the
++   * "popuphidden" event is fired synchronously anyways.
++   *
++   * This means that by the time this method returns all the operations handled
++   * by the "popuphidden" event are completed, for example resetting the "open"
++   * state of the anchor, and the panel is already invisible.
++   */
++  hidePopup() {
++    if (!this.node || !this.connected) {
++      return;
++    }
++
++    // If we have already reached the _panel.openPopup call in the openPopup
++    // method, we can call hidePopup. Otherwise, we have to cancel the latest
++    // request to open the panel, which will have no effect if the request has
++    // been canceled already.
++    if (["open", "showing"].includes(this._panel.state)) {
++      this._panel.hidePopup();
++    } else {
++      this._openPopupCancelCallback();
++    }
++
++    // We close all the views synchronously, so that they are ready to be opened
++    // in other PanelMultiView instances. The "popuphidden" handler may also
++    // call this function, but the second time openViews will be empty.
++    this.closeAllViews();
++  }
++
++  /**
++   * Move any child subviews into the element defined by "viewCacheId" to make
++   * sure they will not be removed together with the <panelmultiview> element.
++   */
++  _moveOutKids() {
++    const viewCacheId = this.node.getAttribute("viewCacheId");
++    if (!viewCacheId) {
++      return;
++    }
++
++    // Node.children and Node.children is live to DOM changes like the
++    // ones we're about to do, so iterate over a static copy:
++    const subviews = Array.from(this._viewStack.children);
++    const viewCache = this.document.getElementById(viewCacheId);
++    for (const subview of subviews) {
++      viewCache.appendChild(subview);
++    }
++  }
++
++  /**
++   * Slides in the specified view as a subview.
++   *
++   * @param viewIdOrNode
++   *        DOM element or string ID of the <panelview> to display.
++   * @param anchor
++   *        DOM element that triggered the subview, which will be highlighted
++   *        and whose "label" attribute will be used for the title of the
++   *        subview when a "title" attribute is not specified.
++   */
++  showSubView(viewIdOrNode, anchor) {
++    this._showSubView(viewIdOrNode, anchor).catch(console.error);
++  }
++  async _showSubView(viewIdOrNode, anchor) {
++    const viewNode =
++      typeof viewIdOrNode == "string"
++        ? this.document.getElementById(viewIdOrNode)
++        : viewIdOrNode;
++    if (!viewNode) {
++      console.error(new Error(`Subview ${viewIdOrNode} doesn't exist.`));
++      return;
++    }
++
++    if (!this.openViews.length) {
++      console.error(new Error(`Cannot show a subview in a closed panel.`));
++      return;
++    }
++
++    const prevPanelView = this.openViews[this.openViews.length - 1];
++    const nextPanelView = PanelView.forNode(viewNode);
++    if (this.openViews.includes(nextPanelView)) {
++      console.error(new Error(`Subview ${viewNode.id} is already open.`));
++      return;
++    }
++
++    // Do not re-enter the process if navigation is already in progress. Since
++    // there is only one active view at any given time, we can do this check
++    // safely, even considering that during the navigation process the actual
++    // view to which prevPanelView refers will change.
++    if (!prevPanelView.active) {
++      return;
++    }
++    // If prevPanelView._doingKeyboardActivation is true, it will be reset to
++    // false synchronously. Therefore, we must capture it before we use any
++    // "await" statements.
++    const doingKeyboardActivation = prevPanelView._doingKeyboardActivation;
++    // Marking the view that is about to scrolled out of the visible area as
++    // inactive will prevent re-entrancy and also disable keyboard navigation.
++    // From this point onwards, "await" statements can be used safely.
++    prevPanelView.active = false;
++
++    // Provide visual feedback while navigation is in progress, starting before
++    // the transition starts and ending when the previous view is invisible.
++    if (anchor) {
++      anchor.setAttribute("open", "true");
++    }
++    try {
++      // If the ViewShowing event cancels the operation we have to re-enable
++      // keyboard navigation, but this must be avoided if the panel was closed.
++      if (!(await this._openView(nextPanelView))) {
++        if (prevPanelView.isOpenIn(this)) {
++          // We don't raise a ViewShown event because nothing actually changed.
++          // Technically we should use a different state flag just because there
++          // is code that could check the "active" property to determine whether
++          // to wait for a ViewShown event later, but this only happens in
++          // regression tests and is less likely to be a technique used in
++          // production code, where use of ViewShown is less common.
++          prevPanelView.active = true;
++        }
++        return;
++      }
++
++      prevPanelView.captureKnownSize();
++
++      // The main view of a panel can be a subview in another one. Make sure to
++      // reset all the properties that may be set on a subview.
++      nextPanelView.mainview = false;
++      // The header may change based on how the subview was opened.
++      nextPanelView.headerText =
++        viewNode.getAttribute("title") ||
++        (anchor && anchor.getAttribute("label"));
++      // The constrained width of subviews may also vary between panels.
++      nextPanelView.minMaxWidth = prevPanelView.knownWidth;
++
++      if (anchor) {
++        viewNode.classList.add("PanelUI-subView");
++      }
++
++      await this._transitionViews(prevPanelView.node, viewNode, false, anchor);
++    } finally {
++      if (anchor) {
++        anchor.removeAttribute("open");
++      }
++    }
++
++    nextPanelView.focusWhenActive = doingKeyboardActivation;
++    this._activateView(nextPanelView);
++  }
++
++  /**
++   * Navigates backwards by sliding out the most recent subview.
++   */
++  goBack() {
++    this._goBack().catch(console.error);
++  }
++  async _goBack() {
++    if (this.openViews.length < 2) {
++      // This may be called by keyboard navigation or external code when only
++      // the main view is open.
++      return;
++    }
++
++    const prevPanelView = this.openViews[this.openViews.length - 1];
++    const nextPanelView = this.openViews[this.openViews.length - 2];
++
++    // Like in the showSubView method, do not re-enter navigation while it is
++    // in progress, and make the view inactive immediately. From this point
++    // onwards, "await" statements can be used safely.
++    if (!prevPanelView.active) {
++      return;
++    }
++
++    prevPanelView.active = false;
++
++    prevPanelView.captureKnownSize();
++
++    await this._transitionViews(prevPanelView.node, nextPanelView.node, true);
++
++    this._closeLatestView();
++
++    this._activateView(nextPanelView);
++  }
++
++  /**
++   * Prepares the main view before showing the panel.
++   */
++  async _showMainView() {
++    const nextPanelView = PanelView.forNode(
++      this.document.getElementById(this.node.getAttribute("mainViewId"))
++    );
++
++    // If the view is already open in another panel, close the panel first.
++    const oldPanelMultiViewNode = nextPanelView.node.panelMultiView;
++    if (oldPanelMultiViewNode) {
++      PanelMultiView.forNode(oldPanelMultiViewNode).hidePopup();
++      // Wait for a layout flush after hiding the popup, otherwise the view may
++      // not be displayed correctly for some time after the new panel is opened.
++      // This is filed as bug 1441015.
++      await this.window.promiseDocumentFlushed(() => {});
++    }
++
++    if (!(await this._openView(nextPanelView))) {
++      return false;
++    }
++
++    // The main view of a panel can be a subview in another one. Make sure to
++    // reset all the properties that may be set on a subview.
++    nextPanelView.mainview = true;
++    nextPanelView.headerText = "";
++    nextPanelView.minMaxWidth = 0;
++
++    // Ensure the view will be visible once the panel is opened.
++    nextPanelView.visible = true;
++
++    return true;
++  }
++
++  /**
++   * Opens the specified PanelView and dispatches the ViewShowing event, which
++   * can be used to populate the subview or cancel the operation.
++   *
++   * This also clears all the attributes and styles that may be left by a
++   * transition that was interrupted.
++   *
++   * @resolves With true if the view was opened, false otherwise.
++   */
++  async _openView(panelView) {
++    if (panelView.node.parentNode != this._viewStack) {
++      this._viewStack.appendChild(panelView.node);
++    }
++
++    panelView.node.panelMultiView = this.node;
++    this.openViews.push(panelView);
++
++    const canceled = await panelView.dispatchAsyncEvent("ViewShowing");
++
++    // The panel can be hidden while we are processing the ViewShowing event.
++    // This results in all the views being closed synchronously, and at this
++    // point the ViewHiding event has already been dispatched for all of them.
++    if (!this.openViews.length) {
++      return false;
++    }
++
++    // Check if the event requested cancellation but the panel is still open.
++    if (canceled) {
++      // Handlers for ViewShowing can't know if a different handler requested
++      // cancellation, so this will dispatch a ViewHiding event to give a chance
++      // to clean up.
++      this._closeLatestView();
++      return false;
++    }
++
++    // Clean up all the attributes and styles related to transitions. We do this
++    // here rather than when the view is closed because we are likely to make
++    // other DOM modifications soon, which isn't the case when closing.
++    const { style } = panelView.node;
++    style.removeProperty("outline");
++    style.removeProperty("width");
++
++    return true;
++  }
++
++  /**
++   * Activates the specified view and raises the ViewShown event, unless the
++   * view was closed in the meantime.
++   */
++  _activateView(panelView) {
++    if (panelView.isOpenIn(this)) {
++      panelView.active = true;
++      if (panelView.focusWhenActive) {
++        panelView.focusFirstNavigableElement(false, true);
++        panelView.focusWhenActive = false;
++      }
++      panelView.dispatchCustomEvent("ViewShown");
++    }
++  }
++
++  /**
++   * Closes the most recent PanelView and raises the ViewHiding event.
++   *
++   * @note The ViewHiding event is not cancelable and should probably be renamed
++   *       to ViewHidden or ViewClosed instead, see bug 1438507.
++   */
++  _closeLatestView() {
++    const panelView = this.openViews.pop();
++    panelView.clearNavigation();
++    panelView.dispatchCustomEvent("ViewHiding");
++    panelView.node.panelMultiView = null;
++    // Views become invisible synchronously when they are closed, and they won't
++    // become visible again until they are opened. When this is called at the
++    // end of backwards navigation, the view is already invisible.
++    panelView.visible = false;
++  }
++
++  /**
++   * Closes all the views that are currently open.
++   */
++  closeAllViews() {
++    // Raise ViewHiding events for open views in reverse order.
++    while (this.openViews.length) {
++      this._closeLatestView();
++    }
++  }
++
++  /**
++   * Apply a transition to 'slide' from the currently active view to the next
++   * one.
++   * Sliding the next subview in means that the previous panelview stays where it
++   * is and the active panelview slides in from the left in LTR mode, right in
++   * RTL mode.
++   *
++   * @param {panelview} previousViewNode Node that is currently displayed, but
++   *                                     is about to be transitioned away. This
++   *                                     must be already inactive at this point.
++   * @param {panelview} viewNode - Node that will becode the active view,
++   *                                     after the transition has finished.
++   * @param {boolean}   reverse          Whether we're navigation back to a
++   *                                     previous view or forward to a next view.
++   */
++  async _transitionViews(previousViewNode, viewNode, reverse) {
++    const { window } = this;
++
++    const nextPanelView = PanelView.forNode(viewNode);
++    const prevPanelView = PanelView.forNode(previousViewNode);
++
++    const details = (this._transitionDetails = {
++      phase: TRANSITION_PHASES.START,
++    });
++
++    // Set the viewContainer dimensions to make sure only the current view is
++    // visible.
++    const olderView = reverse ? nextPanelView : prevPanelView;
++    this._viewContainer.style.minHeight = olderView.knownHeight + "px";
++    this._viewContainer.style.height = prevPanelView.knownHeight + "px";
++    this._viewContainer.style.width = prevPanelView.knownWidth + "px";
++    // Lock the dimensions of the window that hosts the popup panel.
++    const rect = this._getBoundsWithoutFlushing(this._panel);
++    this._panel.style.width = rect.width + "px";
++    this._panel.style.height = rect.height + "px";
++
++    let viewRect;
++    if (reverse) {
++      // Use the cached size when going back to a previous view, but not when
++      // reopening a subview, because its contents may have changed.
++      viewRect = {
++        width: nextPanelView.knownWidth,
++        height: nextPanelView.knownHeight,
++      };
++      nextPanelView.visible = true;
++    } else if (viewNode.customRectGetter) {
++      // We use a customRectGetter for WebExtensions panels, because they need
++      // to query the size from an embedded browser. The presence of this
++      // getter also provides an indication that the view node shouldn't be
++      // moved around, otherwise the state of the browser would get disrupted.
++      const width = prevPanelView.knownWidth;
++      const height = prevPanelView.knownHeight;
++      viewRect = Object.assign({ height, width }, viewNode.customRectGetter());
++      nextPanelView.visible = true;
++      // Until the header is visible, it has 0 height.
++      // Wait for layout before measuring it
++      const header = viewNode.firstElementChild;
++      if (header && header.classList.contains("panel-header")) {
++        viewRect.height += await window.promiseDocumentFlushed(() => {
++          return this._getBoundsWithoutFlushing(header).height;
++        });
++      }
++    } else {
++      this._offscreenViewStack.style.minHeight = olderView.knownHeight + "px";
++      this._offscreenViewStack.appendChild(viewNode);
++      nextPanelView.visible = true;
++
++      viewRect = await window.promiseDocumentFlushed(() => {
++        return this._getBoundsWithoutFlushing(viewNode);
++      });
++      // Bail out if the panel was closed in the meantime.
++      if (!nextPanelView.isOpenIn(this)) {
++        return;
++      }
++
++      // Place back the view after all the other views that are already open in
++      // order for the transition to work as expected.
++      this._viewStack.appendChild(viewNode);
++
++      this._offscreenViewStack.style.removeProperty("min-height");
++    }
++
++    this._transitioning = true;
++    details.phase = TRANSITION_PHASES.PREPARE;
++
++    // The 'magic' part: build up the amount of pixels to move right or left.
++    const moveToLeft =
++      (this.window.RTL_UI && !reverse) || (!this.window.RTL_UI && reverse);
++    const deltaX = prevPanelView.knownWidth;
++    const deepestNode = reverse ? previousViewNode : viewNode;
++
++    // With a transition when navigating backwards - user hits the 'back'
++    // button - we need to make sure that the views are positioned in a way
++    // that a translateX() unveils the previous view from the right direction.
++    if (reverse) {
++      this._viewStack.style.marginInlineStart = "-" + deltaX + "px";
++    }
++
++    // Set the transition style and listen for its end to clean up and make sure
++    // the box sizing becomes dynamic again.
++    // Somehow, putting these properties in PanelUI.css doesn't work for newly
++    // shown nodes in a XUL parent node.
++    this._viewStack.style.transition =
++      "transform var(--animation-easing-function)" +
++      " var(--panelui-subview-transition-duration)";
++    this._viewStack.style.willChange = "transform";
++    // Use an outline instead of a border so that the size is not affected.
++    deepestNode.style.outline = "1px solid var(--panel-separator-color)";
++
++    // Now that all the elements are in place for the start of the transition,
++    // give the layout code a chance to set the initial values.
++    await window.promiseDocumentFlushed(() => {});
++    // Bail out if the panel was closed in the meantime.
++    if (!nextPanelView.isOpenIn(this)) {
++      return;
++    }
++
++    // Now set the viewContainer dimensions to that of the new view, which
++    // kicks of the height animation.
++    this._viewContainer.style.height = viewRect.height + "px";
++    this._viewContainer.style.width = viewRect.width + "px";
++    this._panel.style.removeProperty("width");
++    this._panel.style.removeProperty("height");
++
++    // We're setting the width property to prevent flickering during the
++    // sliding animation with smaller views.
++    viewNode.style.width = viewRect.width + "px";
++
++    // Kick off the transition!
++    details.phase = TRANSITION_PHASES.TRANSITION;
++
++    // If we're going to show the main view, we can remove the
++    // min-height property on the view container.
++    if (viewNode.getAttribute("mainview")) {
++      this._viewContainer.style.removeProperty("min-height");
++    }
++
++    this._viewStack.style.transform =
++      "translateX(" + (moveToLeft ? "" : "-") + deltaX + "px)";
++
++    await new Promise(resolve => {
++      details.resolve = resolve;
++      this._viewContainer.addEventListener(
++        "transitionend",
++        (details.listener = ev => {
++          // It's quite common that `height` on the view container doesn't need
++          // to transition, so we make sure to do all the work on the transform
++          // transition-end, because that is guaranteed to happen.
++          if (ev.target != this._viewStack || ev.propertyName != "transform") {
++            return;
++          }
++          this._viewContainer.removeEventListener(
++            "transitionend",
++            details.listener
++          );
++          delete details.listener;
++          resolve();
++        })
++      );
++      this._viewContainer.addEventListener(
++        "transitioncancel",
++        (details.cancelListener = ev => {
++          if (ev.target != this._viewStack) {
++            return;
++          }
++          this._viewContainer.removeEventListener(
++            "transitioncancel",
++            details.cancelListener
++          );
++          delete details.cancelListener;
++          resolve();
++        })
++      );
++    });
++
++    // Bail out if the panel was closed during the transition.
++    if (!nextPanelView.isOpenIn(this)) {
++      return;
++    }
++    prevPanelView.visible = false;
++
++    // This will complete the operation by removing any transition properties.
++    nextPanelView.node.style.removeProperty("width");
++    deepestNode.style.removeProperty("outline");
++    this._cleanupTransitionPhase();
++
++    nextPanelView.focusSelectedElement();
++  }
++
++  /**
++   * Attempt to clean up the attributes and properties set by `_transitionViews`
++   * above. Which attributes and properties depends on the phase the transition
++   * was left from.
++   */
++  _cleanupTransitionPhase() {
++    if (!this._transitionDetails) {
++      return;
++    }
++
++    const { phase, resolve, listener, cancelListener } =
++      this._transitionDetails;
++    this._transitionDetails = null;
++
++    if (phase >= TRANSITION_PHASES.START) {
++      this._panel.style.removeProperty("width");
++      this._panel.style.removeProperty("height");
++      this._viewContainer.style.removeProperty("height");
++      this._viewContainer.style.removeProperty("width");
++    }
++    if (phase >= TRANSITION_PHASES.PREPARE) {
++      this._transitioning = false;
++      this._viewStack.style.removeProperty("margin-inline-start");
++      this._viewStack.style.removeProperty("transition");
++    }
++    if (phase >= TRANSITION_PHASES.TRANSITION) {
++      this._viewStack.style.removeProperty("transform");
++      if (listener) {
++        this._viewContainer.removeEventListener("transitionend", listener);
++      }
++      if (cancelListener) {
++        this._viewContainer.removeEventListener(
++          "transitioncancel",
++          cancelListener
++        );
++      }
++      if (resolve) {
++        resolve();
++      }
++    }
++  }
++
++  _calculateMaxHeight(aEvent) {
++    // While opening the panel, we have to limit the maximum height of any
++    // view based on the space that will be available. We cannot just use
++    // window.screen.availTop and availHeight because these may return an
++    // incorrect value when the window spans multiple screens.
++    const anchor = this._panel.anchorNode;
++    const anchorRect = anchor.getBoundingClientRect();
++
++    const screen = this._screenManager.screenForRect(
++      anchor.screenX,
++      anchor.screenY,
++      anchorRect.width,
++      anchorRect.height
++    );
++    const availTop = {},
++      availHeight = {};
++    screen.GetAvailRect({}, availTop, {}, availHeight);
++    const cssAvailTop = availTop.value / screen.defaultCSSScaleFactor;
++
++    // The distance from the anchor to the available margin of the screen is
++    // based on whether the panel will open towards the top or the bottom.
++    let maxHeight;
++    if (aEvent.alignmentPosition.startsWith("before_")) {
++      maxHeight = anchor.screenY - cssAvailTop;
++    } else {
++      const anchorScreenBottom = anchor.screenY + anchorRect.height;
++      const cssAvailHeight = availHeight.value / screen.defaultCSSScaleFactor;
++      maxHeight = cssAvailTop + cssAvailHeight - anchorScreenBottom;
++    }
++
++    // To go from the maximum height of the panel to the maximum height of
++    // the view stack, we need to subtract the height of the arrow and the
++    // height of the opposite margin, but we cannot get their actual values
++    // because the panel is not visible yet. However, we know that this is
++    // currently 11px on Mac, 13px on Windows, and 13px on Linux. We also
++    // want an extra margin, both for visual reasons and to prevent glitches
++    // due to small rounding errors. So, we just use a value that makes
++    // sense for all platforms. If the arrow visuals change significantly,
++    // this value will be easy to adjust.
++    const EXTRA_MARGIN_PX = 20;
++    maxHeight -= EXTRA_MARGIN_PX;
++    return maxHeight;
++  }
++
++  handleEvent(aEvent) {
++    // Only process actual popup events from the panel or events we generate
++    // ourselves, but not from menus being shown from within the panel.
++    if (
++      aEvent.type.startsWith("popup") &&
++      aEvent.target != this._panel &&
++      aEvent.target != this.node
++    ) {
++      return;
++    }
++    switch (aEvent.type) {
++      case "keydown":
++        // Since we start listening for the "keydown" event when the popup is
++        // already showing and stop listening when the panel is hidden, we
++        // always have at least one view open.
++        const currentView = this.openViews[this.openViews.length - 1];
++        currentView.keyNavigation(aEvent);
++        break;
++      case "mousemove":
++        this.openViews.forEach(panelView => panelView.clearNavigation());
++        break;
++      case "popupshowing": {
++        this._viewContainer.setAttribute("panelopen", "true");
++        if (!this.node.hasAttribute("disablekeynav")) {
++          // We add the keydown handler on the window so that it handles key
++          // presses when a panel appears but doesn't get focus, as happens
++          // when a button to open a panel is clicked with the mouse.
++          // However, this means the listener is on an ancestor of the panel,
++          // which means that handlers such as ToolbarKeyboardNavigator are
++          // deeper in the tree. Therefore, this must be a capturing listener
++          // so we get the event first.
++          this.window.addEventListener("keydown", this, true);
++          this._panel.addEventListener("mousemove", this);
++        }
++        break;
++      }
++      case "popuppositioned": {
++        if (this._panel.state == "showing") {
++          const maxHeight = this._calculateMaxHeight(aEvent);
++          this._viewStack.style.maxHeight = maxHeight + "px";
++          this._offscreenViewStack.style.maxHeight = maxHeight + "px";
++        }
++        break;
++      }
++      case "popupshown":
++        // The main view is always open and visible when the panel is first
++        // shown, so we can check the height of the description elements it
++        // contains and notify consumers using the ViewShown event. In order to
++        // minimize flicker we need to allow synchronous reflows, and we still
++        // make sure the ViewShown event is dispatched synchronously.
++        const mainPanelView = this.openViews[0];
++        this._activateView(mainPanelView);
++        break;
++      case "popuphidden": {
++        // WebExtensions consumers can hide the popup from viewshowing, or
++        // mid-transition, which disrupts our state:
++        this._transitioning = false;
++        this._viewContainer.removeAttribute("panelopen");
++        this._cleanupTransitionPhase();
++        this.window.removeEventListener("keydown", this, true);
++        this._panel.removeEventListener("mousemove", this);
++        this.closeAllViews();
++
++        // Clear the main view size caches. The dimensions could be different
++        // when the popup is opened again, e.g. through touch mode sizing.
++        this._viewContainer.style.removeProperty("min-height");
++        this._viewStack.style.removeProperty("max-height");
++        this._viewContainer.style.removeProperty("width");
++        this._viewContainer.style.removeProperty("height");
++
++        this.dispatchCustomEvent("PanelMultiViewHidden");
++        break;
++      }
++    }
++  }
++}
++
++/**
++ * This is associated to <panelview> elements.
++ */
++export class PanelView extends AssociatedToNode {
++  constructor(node) {
++    super(node);
++
++    /**
++     * Indicates whether the view is active. When this is false, consumers can
++     * wait for the ViewShown event to know when the view becomes active.
++     */
++    this.active = false;
++
++    /**
++     * Specifies whether the view should be focused when active. When this
++     * is true, the first navigable element in the view will be focused
++     * when the view becomes active. This should be set to true when the view
++     * is activated from the keyboard. It will be set to false once the view
++     * is active.
++     */
++    this.focusWhenActive = false;
++  }
++
++  /**
++   * Indicates whether the view is open in the specified PanelMultiView object.
++   */
++  isOpenIn(panelMultiView) {
++    return this.node.panelMultiView == panelMultiView.node;
++  }
++
++  /**
++   * The "mainview" attribute is set before the panel is opened when this view
++   * is displayed as the main view, and is removed before the <panelview> is
++   * displayed as a subview. The same view element can be displayed as a main
++   * view and as a subview at different times.
++   */
++  set mainview(value) {
++    if (value) {
++      this.node.setAttribute("mainview", true);
++    } else {
++      this.node.removeAttribute("mainview");
++    }
++  }
++
++  /**
++   * Determines whether the view is visible. Setting this to false also resets
++   * the "active" property.
++   */
++  set visible(value) {
++    if (value) {
++      this.node.setAttribute("visible", true);
++    } else {
++      this.node.removeAttribute("visible");
++      this.active = false;
++      this.focusWhenActive = false;
++    }
++  }
++
++  /**
++   * Constrains the width of this view using the "min-width" and "max-width"
++   * styles. Setting this to zero removes the constraints.
++   */
++  set minMaxWidth(value) {
++    const style = this.node.style;
++    if (value) {
++      style.minWidth = style.maxWidth = value + "px";
++    } else {
++      style.removeProperty("min-width");
++      style.removeProperty("max-width");
++    }
++  }
++
++  /**
++   * Adds a header with the given title, or removes it if the title is empty.
++   */
++  set headerText(value) {
++    // If the header already exists, update or remove it as requested.
++    let header = this.node.firstElementChild;
++    if (header && header.classList.contains("panel-header")) {
++      if (value) {
++        header.querySelector(".panel-header > h1 > span").textContent = value;
++      } else {
++        header.remove();
++      }
++      return;
++    }
++
++    // The header doesn't exist, only create it if needed.
++    if (!value) {
++      return;
++    }
++
++    header = this.document.createXULElement("box");
++    header.classList.add("panel-header");
++
++    const backButton = this.document.createXULElement("toolbarbutton");
++    backButton.className =
++      "subviewbutton subviewbutton-iconic subviewbutton-back";
++    backButton.setAttribute("closemenu", "none");
++    backButton.setAttribute("tabindex", "0");
++
++    backButton.setAttribute(
++      "aria-label",
++      lazy.gBundle.GetStringFromName("panel.back")
++    );
++
++    backButton.addEventListener("command", () => {
++      // The panelmultiview element may change if the view is reused.
++      this.node.panelMultiView.goBack();
++      backButton.blur();
++    });
++
++    const h1 = this.document.createElement("h1");
++    const span = this.document.createElement("span");
++    span.textContent = value;
++    h1.appendChild(span);
++
++    header.append(backButton, h1);
++    this.node.prepend(header);
++  }
++
++  /**
++   * Populates the "knownWidth" and "knownHeight" properties with the current
++   * dimensions of the view. These may be zero if the view is invisible.
++   *
++   * These values are relevant during transitions and are retained for backwards
++   * navigation if the view is still open but is invisible.
++   */
++  captureKnownSize() {
++    const rect = this._getBoundsWithoutFlushing(this.node);
++    this.knownWidth = rect.width;
++    this.knownHeight = rect.height;
++  }
++
++  /**
++   * Determine whether an element can only be navigated to with tab/shift+tab,
++   * not the arrow keys.
++   */
++  _isNavigableWithTabOnly(element) {
++    const tag = element.localName;
++    return (
++      tag == "menulist" ||
++      tag == "input" ||
++      tag == "textarea" ||
++      // Allow tab to reach embedded documents in extension panels.
++      tag == "browser"
++    );
++  }
++
++  /**
++   * Make a TreeWalker for keyboard navigation.
++   *
++   * @param {boolean} arrowKey If `true`, elements only navigable with tab are
++   *        excluded.
++   */
++  _makeNavigableTreeWalker(arrowKey) {
++    const filter = node => {
++      if (node.disabled) {
++        return NodeFilter.FILTER_REJECT;
++      }
++      const bounds = this._getBoundsWithoutFlushing(node);
++      if (bounds.width == 0 || bounds.height == 0) {
++        return NodeFilter.FILTER_REJECT;
++      }
++      if (
++        node.tagName == "button" ||
++        node.tagName == "toolbarbutton" ||
++        node.classList.contains("text-link") ||
++        (!arrowKey && this._isNavigableWithTabOnly(node))
++      ) {
++        // Set the tabindex attribute to make sure the node is focusable.
++        if (!node.hasAttribute("tabindex")) {
++          node.setAttribute("tabindex", "-1");
++        }
++        return NodeFilter.FILTER_ACCEPT;
++      }
++      return NodeFilter.FILTER_SKIP;
++    };
++    return this.document.createTreeWalker(
++      this.node,
++      NodeFilter.SHOW_ELEMENT,
++      filter
++    );
++  }
++
++  /**
++   * Get a TreeWalker which finds elements navigable with tab/shift+tab.
++   */
++  get _tabNavigableWalker() {
++    if (!this.__tabNavigableWalker) {
++      this.__tabNavigableWalker = this._makeNavigableTreeWalker(false);
++    }
++    return this.__tabNavigableWalker;
++  }
++
++  /**
++   * Get a TreeWalker which finds elements navigable with up/down arrow keys.
++   */
++  get _arrowNavigableWalker() {
++    if (!this.__arrowNavigableWalker) {
++      this.__arrowNavigableWalker = this._makeNavigableTreeWalker(true);
++    }
++    return this.__arrowNavigableWalker;
++  }
++
++  /**
++   * Element that is currently selected with the keyboard, or null if no element
++   * is selected. Since the reference is held weakly, it can become null or
++   * undefined at any time.
++   */
++  get selectedElement() {
++    return this._selectedElement && this._selectedElement.get();
++  }
++  set selectedElement(value) {
++    if (!value) {
++      delete this._selectedElement;
++    } else {
++      this._selectedElement = Cu.getWeakReference(value);
++    }
++  }
++
++  /**
++   * Focuses and moves keyboard selection to the first navigable element.
++   * This is a no-op if there are no navigable elements.
++   *
++   * @param {boolean} homeKey - `true` if this is for the home key.
++   * @param {boolean} skipBack - `true` if the Back button should be skipped.
++   */
++  focusFirstNavigableElement(homeKey = false, skipBack = false) {
++    // The home key is conceptually similar to the up/down arrow keys.
++    const walker = homeKey
++      ? this._arrowNavigableWalker
++      : this._tabNavigableWalker;
++    walker.currentNode = walker.root;
++    this.selectedElement = walker.firstChild();
++    if (
++      skipBack &&
++      walker.currentNode &&
++      walker.currentNode.classList.contains("subviewbutton-back") &&
++      walker.nextNode()
++    ) {
++      this.selectedElement = walker.currentNode;
++    }
++    this.focusSelectedElement(/* byKey */ true);
++  }
++
++  /**
++   * Focuses and moves keyboard selection to the last navigable element.
++   * This is a no-op if there are no navigable elements.
++   *
++   * @param {boolean} endKey - `true` if this is for the end key.
++   */
++  focusLastNavigableElement(endKey = false) {
++    // The end key is conceptually similar to the up/down arrow keys.
++    const walker = endKey
++      ? this._arrowNavigableWalker
++      : this._tabNavigableWalker;
++    walker.currentNode = walker.root;
++    this.selectedElement = walker.lastChild();
++    this.focusSelectedElement(/* byKey */ true);
++  }
++
++  /**
++   * Based on going up or down, select the previous or next focusable element.
++   *
++   * @param {boolean} isDown - whether we're going down (true) or up (false).
++   * @param {boolean} arrowKey - `true` if this is for the up/down arrow keys.
++   *
++   * @returns {DOMNode} the element we selected.
++   */
++  moveSelection(isDown, arrowKey = false) {
++    const walker = arrowKey
++      ? this._arrowNavigableWalker
++      : this._tabNavigableWalker;
++    const oldSel = this.selectedElement;
++    let newSel;
++    if (oldSel) {
++      walker.currentNode = oldSel;
++      newSel = isDown ? walker.nextNode() : walker.previousNode();
++    }
++    // If we couldn't find something, select the first or last item:
++    if (!newSel) {
++      walker.currentNode = walker.root;
++      newSel = isDown ? walker.firstChild() : walker.lastChild();
++    }
++    this.selectedElement = newSel;
++    return newSel;
++  }
++
++  /**
++   * Allow for navigating subview buttons using the arrow keys and the Enter key.
++   * The Up and Down keys can be used to navigate the list up and down and the
++   * Enter, Right or Left - depending on the text direction - key can be used to
++   * simulate a click on the currently selected button.
++   * The Right or Left key - depending on the text direction - can be used to
++   * navigate to the previous view, functioning as a shortcut for the view's
++   * back button.
++   * Thus, in LTR mode:
++   *  - The Right key functions the same as the Enter key, simulating a click
++   *  - The Left key triggers a navigation back to the previous view.
++   *
++   * Key navigation is only enabled while the view is active, meaning that this
++   * method will return early if it is invoked during a sliding transition.
++   *
++   * @param {KeyEvent} event
++   */
++  /* eslint-disable-next-line complexity */
++  keyNavigation(event) {
++    if (!this.active) {
++      return;
++    }
++
++    let focus = this.document.activeElement;
++    // Make sure the focus is actually inside the panel. (It might not be if
++    // the panel was opened with the mouse.) If it isn't, we don't care
++    // about it for our purposes.
++    // We use Node.compareDocumentPosition because Node.contains doesn't
++    // behave as expected for anonymous content; e.g. the input inside a
++    // textbox.
++    if (
++      focus &&
++      !(
++        this.node.compareDocumentPosition(focus) &
++        Node.DOCUMENT_POSITION_CONTAINED_BY
++      )
++    ) {
++      focus = null;
++    }
++
++    // Extension panels contain embedded documents. We can't manage
++    // keyboard navigation within those.
++    if (focus && focus.tagName == "browser") {
++      return;
++    }
++
++    const stop = () => {
++      event.stopPropagation();
++      event.preventDefault();
++    };
++
++    // If the focused element is only navigable with tab, it wants the arrow
++    // keys, etc. We shouldn't handle any keys except tab and shift+tab.
++    // We make a function for this for performance reasons: we only want to
++    // check this for keys we potentially care about, not *all* keys.
++    const tabOnly = () => {
++      // We use the real focus rather than this.selectedElement because focus
++      // might have been moved without keyboard navigation (e.g. mouse click)
++      // and this.selectedElement is only updated for keyboard navigation.
++      return focus && this._isNavigableWithTabOnly(focus);
++    };
++
++    // If a context menu is open, we must let it handle all keys.
++    // Normally, this just happens, but because we have a capturing window
++    // keydown listener, our listener takes precedence.
++    // Again, we only want to do this check on demand for performance.
++    const isContextMenuOpen = () => {
++      if (!focus) {
++        return false;
++      }
++      const contextNode = focus.closest("[context]");
++      if (!contextNode) {
++        return false;
++      }
++      const context = contextNode.getAttribute("context");
++      const popup = this.document.getElementById(context);
++      return popup && popup.state == "open";
++    };
++
++    const keyCode = event.code;
++    switch (keyCode) {
++      case "ArrowDown":
++      case "ArrowUp":
++        if (tabOnly()) {
++          break;
++        }
++      // Fall-through...
++      case "Tab": {
++        if (isContextMenuOpen()) {
++          break;
++        }
++        stop();
++        const isDown =
++          keyCode == "ArrowDown" || (keyCode == "Tab" && !event.shiftKey);
++        const button = this.moveSelection(isDown, keyCode != "Tab");
++        Services.focus.setFocus(button, Services.focus.FLAG_BYKEY);
++        break;
++      }
++      case "Home":
++        if (tabOnly() || isContextMenuOpen()) {
++          break;
++        }
++        stop();
++        this.focusFirstNavigableElement(true);
++        break;
++      case "End":
++        if (tabOnly() || isContextMenuOpen()) {
++          break;
++        }
++        stop();
++        this.focusLastNavigableElement(true);
++        break;
++      case "ArrowLeft":
++      case "ArrowRight": {
++        if (tabOnly() || isContextMenuOpen()) {
++          break;
++        }
++        stop();
++        if (
++          (!this.window.RTL_UI && keyCode == "ArrowLeft") ||
++          (this.window.RTL_UI && keyCode == "ArrowRight")
++        ) {
++          this.node.panelMultiView.goBack();
++          break;
++        }
++        // If the current button is _not_ one that points to a subview, pressing
++        // the arrow key shouldn't do anything.
++        const button = this.selectedElement;
++        if (!button || !button.classList.contains("subviewbutton-nav")) {
++          break;
++        }
++      }
++      // Fall-through...
++      case "Space":
++      case "NumpadEnter":
++      case "Enter": {
++        if (tabOnly() || isContextMenuOpen()) {
++          break;
++        }
++        const button = this.selectedElement;
++        if (!button) {
++          break;
++        }
++        stop();
++
++        this._doingKeyboardActivation = true;
++        // Unfortunately, 'tabindex' doesn't execute the default action, so
++        // we explicitly do this here.
++        // We are sending a command event, a mousedown event and then a click
++        // event. This is done in order to mimic a "real" mouse click event.
++        // Normally, the command event executes the action, then the click event
++        // closes the menu. However, in some cases (e.g. the Library button),
++        // there is no command event handler and the mousedown event executes the
++        // action instead.
++        button.doCommand();
++        let dispEvent = new event.target.ownerGlobal.MouseEvent("mousedown", {
++          bubbles: true,
++        });
++        button.dispatchEvent(dispEvent);
++        dispEvent = new event.target.ownerGlobal.MouseEvent("click", {
++          bubbles: true,
++        });
++        button.dispatchEvent(dispEvent);
++        this._doingKeyboardActivation = false;
++        break;
++      }
++    }
++  }
++
++  /**
++   * Focus the last selected element in the view, if any.
++   *
++   * @param byKey {Boolean} whether focus was moved by the user pressing a key.
++   *                        Needed to ensure we show focus styles in the right cases.
++   */
++  focusSelectedElement(byKey = false) {
++    const selected = this.selectedElement;
++    if (selected) {
++      const flag = byKey ? "FLAG_BYKEY" : "FLAG_BYELEMENTFOCUS";
++      Services.focus.setFocus(selected, Services.focus[flag]);
++    }
++  }
++
++  /**
++   * Clear all traces of keyboard navigation happening right now.
++   */
++  clearNavigation() {
++    const selected = this.selectedElement;
++    if (selected) {
++      selected.blur();
++      this.selectedElement = null;
++    }
++  }
++}
+diff --git a/suite/buoy/modules/SessionStore.sys.mjs b/suite/buoy/modules/SessionStore.sys.mjs
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/modules/SessionStore.sys.mjs
+@@ -0,0 +1,12 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
++ * You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++/**
++ * This is a shim for SessionStore in moz-central to prevent bug 1713801. Only
++ * the methods that appear to be hit by comm-central are implemented.
++ */
++export var SessionStore = {
++  updateSessionStoreFromTablistener(aBrowser, aBrowsingContext, aData) {},
++  maybeExitCrashedState() {},
++};
+diff --git a/suite/buoy/modules/moz.build b/suite/buoy/modules/moz.build
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/modules/moz.build
+@@ -0,0 +1,16 @@
++# vim: set filetype=python:
++# This Source Code Form is subject to the terms of the Mozilla Public
++# License, v. 2.0. If a copy of the MPL was not distributed with this
++# file, You can obtain one at http://mozilla.org/MPL/2.0/.
++
++EXTRA_JS_MODULES += [
++    "BrowserWindowTracker.sys.mjs",
++    "CustomizableUI.sys.mjs",
++    "EzE10SUtils.jsm",
++    "PanelMultiView.sys.mjs",
++]
++
++EXTRA_JS_MODULES.sessionstore += [
++    "SessionStore.sys.mjs",
++]
++
+diff --git a/suite/buoy/moz-l10n/browser/appExtensionFields.ftl b/suite/buoy/moz-l10n/browser/appExtensionFields.ftl
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/moz-l10n/browser/appExtensionFields.ftl
+@@ -0,0 +1,10 @@
++# This Source Code Form is subject to the terms of the Mozilla Public
++# License, v. 2.0. If a copy of the MPL was not distributed with this
++# file, You can obtain one at http://mozilla.org/MPL/2.0/.
++
++## Theme names and descriptions used in the Themes panel in about:addons
++
++# "Auto" is short for automatic. It can be localized without limitations.
++extension-default-theme-name-auto=System theme — auto
++extension-default-theme-description=Follow the operating system setting for buttons, menus, and windows.
++
+diff --git a/suite/buoy/moz-l10n/browser/branding/brandings.ftl b/suite/buoy/moz-l10n/browser/branding/brandings.ftl
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/moz-l10n/browser/branding/brandings.ftl
+@@ -0,0 +1,17 @@
++# This Source Code Form is subject to the terms of the Mozilla Public
++# License, v. 2.0. If a copy of the MPL was not distributed with this
++# file, You can obtain one at http://mozilla.org/MPL/2.0/.
++
++## The following feature names must be treated as a brand.
++##
++## They cannot be:
++## - Transliterated.
++## - Translated.
++##
++## Declension should be avoided where possible, leaving the original
++## brand unaltered in prominent UI positions.
++##
++## For further details, consult:
++## https://mozilla-l10n.github.io/styleguides/mozilla_general/#brands-copyright-and-trademark
++
++-profiler-brand-name = Firefox Profiler
+diff --git a/suite/buoy/moz.build b/suite/buoy/moz.build
+new file mode 100644
+--- /dev/null
++++ b/suite/buoy/moz.build
+@@ -0,0 +1,8 @@
++DIRS += [
++    "devtools",
++    "modules"
++]
++
++JS_PREFERENCE_FILES += ["ZZ-buoy-prefs.js"]
++
++JAR_MANIFESTS += ["jar.mn"]
+diff --git a/suite/mailnews/components/moz.build b/suite/mailnews/components/moz.build
+--- a/suite/mailnews/components/moz.build
++++ b/suite/mailnews/components/moz.build
+@@ -1,11 +1,12 @@
+ # vim: set filetype=python:
+ # This Source Code Form is subject to the terms of the Mozilla Public
+ # License, v. 2.0. If a copy of the MPL was not distributed with this
+ # file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ 
+ DIRS += [
++    "../../../mail/extensions/openpgp",
+     "compose",
+     "prefs",
+     "addrbook",
+     "smime",
+ ]
+diff --git a/suite/moz.build b/suite/moz.build
+--- a/suite/moz.build
++++ b/suite/moz.build
+@@ -6,16 +6,17 @@
+ with Files("**"):
+     BUG_COMPONENT = ("SeaMonkey", "General")
+ 
+ CONFIGURE_SUBST_FILES += ["installer/Makefile"]
+ 
+ DIRS += [
+     "base",
+     "browser",
++    "buoy",
+     "components",
+     "editor",
+     "extensions",
+     "locales",
+     "mailnews",
+     "modules",
+     "themes/classic",
+     "themes/modern",
+diff --git a/suite/moz.configure b/suite/moz.configure
+--- a/suite/moz.configure
++++ b/suite/moz.configure
+@@ -9,16 +9,19 @@ set_define("MOZ_SUITE", True)
+ 
+ imply_option("MOZ_APP_BASENAME", "SeaMonkey")
+ imply_option("MOZ_APP_ID", "{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}")
+ imply_option("MOZ_APP_VENDOR", "Mozilla")
+ # Include the DevTools client, not just the server (which is the default)
+ imply_option("MOZ_DEVTOOLS", "all")
+ imply_option("NSS_EXTRA_SYMBOLS_FILE", "../comm/mailnews/nss-extra.symbols")
+ 
++set_config("MOZ_SANDBOX_NULL_BLOCKLIST_OOP", True)
++set_define("MOZ_SANDBOX_NULL_BLOCKLIST_OOP", True)
++
+ imply_option('--enable-default-browser-agent', False)
+ 
+ @depends(target_is_windows, target_has_linux_kernel)
+ def bundled_fonts(is_windows, is_linux):
+     if is_windows or is_linux:
+         return True
+ 
+ 

moz/mozilla/TOP-UNFINISHED-unrestricted-comm-build.patch

@@ -0,0 +1,92 @@
+# HG changeset patch
+# User Matt A. Tobin <email@mattatobin.com>
+# Date 1722343983 18000
+#      Tue Jul 30 07:53:03 2024 -0500
+# Node ID 94471478bfc4cc4d5478b3512fe7fbf1f5ee0185
+# Parent  86586b64561f8af869e01db10306b37ea4c4e023
+No Bug - Unrestrict comm apps and account for them
+
+diff --git a/python/mozbuild/mozbuild/base.py b/python/mozbuild/mozbuild/base.py
+--- a/python/mozbuild/mozbuild/base.py
++++ b/python/mozbuild/mozbuild/base.py
+@@ -968,16 +968,25 @@ class MachCommandConditions(object):
+     @staticmethod
+     def is_jsshell(cls):
+         """Must have a jsshell build."""
+         if hasattr(cls, "substs"):
+             return cls.substs.get("MOZ_BUILD_APP") == "js"
+         return False
+ 
+     @staticmethod
++    def is_other_comm_app(cls):
++        """Must have a non-Thunderbird comm build"""
++        if hasattr(cls, "substs"):
++            build_app = cls.substs.get("MOZ_BUILD_APP")
++            if build_app.startswith("comm/") and not MachCommandConditions.is_thunderbird(cls):
++               return True
++        return False
++
++    @staticmethod
+     def is_thunderbird(cls):
+         """Must have a Thunderbird build."""
+         if hasattr(cls, "substs"):
+             return cls.substs.get("MOZ_BUILD_APP") == "comm/mail"
+         return False
+ 
+     @staticmethod
+     def is_firefox_or_thunderbird(cls):
+@@ -1007,17 +1016,19 @@ class MachCommandConditions(object):
+             cls
+         ) or MachCommandConditions.is_android(cls)
+ 
+     @staticmethod
+     def has_build(cls):
+         """Must have a build."""
+         return MachCommandConditions.is_firefox_or_android(
+             cls
+-        ) or MachCommandConditions.is_thunderbird(cls)
++        ) or MachCommandConditions.is_thunderbird(
++            cls
++        ) or MachCommandConditions.is_other_comm_app(cls)
+ 
+     @staticmethod
+     def has_build_or_shell(cls):
+         """Must have a build or a shell build."""
+         return MachCommandConditions.has_build(cls) or MachCommandConditions.is_jsshell(
+             cls
+         )
+ 
+diff --git a/security/sandbox/win/src/sandboxbroker/sandboxBroker.cpp b/security/sandbox/win/src/sandboxbroker/sandboxBroker.cpp
+--- a/security/sandbox/win/src/sandboxbroker/sandboxBroker.cpp
++++ b/security/sandbox/win/src/sandboxbroker/sandboxBroker.cpp
+@@ -360,25 +360,25 @@ Result<Ok, mozilla::ipc::LaunchError> Sa
+     return Err(mozilla::ipc::LaunchError::FromWin32Error("SB::LA::SpawnTarget",
+                                                          last_error));
+   } else if (sandbox::SBOX_ALL_OK != last_warning) {
+     // If there was a warning (but the result was still ok), log it and proceed.
+     LOG_W("Warning on SpawnTarget with last_error=%lu, last_warning=%d",
+           last_error, last_warning);
+   }
+ 
+-#ifdef MOZ_THUNDERBIRD
+-  // In Thunderbird, mInitDllBlocklistOOP is null, so InitDllBlocklistOOP would
++#if defined(MOZ_THUNDERBIRD) || defined(MOZ_SANDBOX_NULL_BLOCKLIST_OOP)
++  // In Thunderbird and other comm apps, mInitDllBlocklistOOP is null, so InitDllBlocklistOOP would
+   // hit MOZ_RELEASE_ASSERT.
+-  constexpr bool isThunderbird = true;
++  constexpr bool hasNullDllBlocklistOOP = true;
+ #else
+-  constexpr bool isThunderbird = false;
++  constexpr bool hasNullDllBlocklistOOP = false;
+ #endif
+ 
+-  if (!isThunderbird &&
++  if (!hasNullDllBlocklistOOP &&
+       XRE_GetChildProcBinPathType(aProcessType) == BinPathType::Self) {
+     RefPtr<DllServices> dllSvc(DllServices::Get());
+     LauncherVoidResultWithLineInfo blocklistInitOk =
+         dllSvc->InitDllBlocklistOOP(aPath, targetInfo.hProcess,
+                                     aCachedNtdllThunk, aProcessType);
+     if (blocklistInitOk.isErr()) {
+       dllSvc->HandleLauncherError(blocklistInitOk.unwrapErr(),
+                                   XRE_GeckoProcessTypeToString(aProcessType));