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<?xml version="1.0" encoding="utf-8"?>
<!-- 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/. -->
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
        id="devtools-webconsole"
        macanimationtype="document"
        fullscreenbutton="true"
        title=""
        windowtype="devtools:webconsole"

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# of spans	mem with xbl	mem w/out xbl
1	327400	260648
10	328904	263176
100	396088	294088
1000	982120	577352
10000	6825992	3451208

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<style>
  body {
    margin: 0;
  }
  /* Style the element from the outside */
  /*
  fancy-tabs {
    margin-bottom: 32px;

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<meta charset="utf-8" />
<style>
  /* Trying to emulate the pretty printing on data:text/xml,<foo><bar><baz>wat</baz>asdf</bar></foo> */
  details, details + span { display: inline-block; }
  details[open] { display: block; }

  body > details { margin-inline-start: 0;}
  body > details[open] + span { margin-inline-start: 1em;}
  details { margin-inline-start: 1em;}
  details[open] + span, div.children { margin-inline-start: 2em; }

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// https://treeherder.mozilla.org/#/jobs?repo=try&revision=aaccf2c1ff6b66b52bcfa1390b78bb781b86f672&filter-tier=1&filter-tier=2&filter-tier=3&selectedJob=148874008

var fs = require("fs");
var bsplit = require('buffer-split');

function readLines(path) {
  const buf = fs.readFileSync(path); // omitting encoding returns a Buffer
  const delim = Buffer.from('\n');
  const result = bsplit(buf, delim);

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https://raw.githubusercontent.com/mozilla/gecko-dev/master/dom/xbl/builtin/android/platformHTMLBindings.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/dom/xbl/builtin/emacs/platformHTMLBindings.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/dom/xbl/builtin/mac/platformHTMLBindings.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/dom/xbl/builtin/unix/platformHTMLBindings.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/dom/xbl/builtin/win/platformHTMLBindings.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/dom/xml/resources/XMLPrettyPrint.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/layout/style/xbl-marquee/xbl-marquee.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/toolkit/components/printing/content/printPreviewBindings.xml
https://raw.githubusercontent.com/mozilla/gecko-dev/master/toolkit/components/prompts/content/tabprompts.xml

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<?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/. -->

<bindings id="autocompleteBindings"
          xmlns="http://www.mozilla.org/xbl"
          xmlns:html="http://www.w3.org/1999/xhtml"
          xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
          xmlns:xbl="http://www.mozilla.org/xbl">

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// Doesn't bubble to parentNode, but does fire on gBrowser (the bindingParent for gBrowser.selectedBrowser)
gBrowser.addEventListener("bar", () => { console.log("No explicit bubbling, but bubbled to gBrowser") });
gBrowser.selectedBrowser.parentNode.addEventListener("bar", () => { console.log("No explicit bubbling, did not bubble to parentNode") });
gBrowser.selectedBrowser.dispatchEvent(new CustomEvent("bar"));

// If you tell the CustomEvent to bubble, then it does bubble to the parentNode (and gBrowser):
gBrowser.addEventListener("bar", () => { console.log("Explicit bubbling, did bubble to gBrowser") });
gBrowser.selectedBrowser.parentNode.addEventListener("bar", () => { console.log("Explicit bubbling, did bubble to parentNode") });
gBrowser.selectedBrowser.dispatchEvent(new CustomEvent("bar", { bubbles: true }));

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./mach run --setpref dom.allow_XUL_XBL_for_file=true file:///path/to/minimal.xul

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const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
Cu.import("resource://gre/modules/Services.jsm");

let cleanupAry = [];

function restart() {
  Cc['@mozilla.org/toolkit/app-startup;1'].getService(Ci.nsIAppStartup)
      .quit(Ci.nsIAppStartup.eAttemptQuit | Ci.nsIAppStartup.eRestart);
}