gecko-dev/browser/base/content/browser-tabPreviews.xml

<?xml version="1.0"?>

# -*- Mode: HTML -*-
# 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="tabPreviews"
          xmlns="http://www.mozilla.org/xbl"
          xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
          xmlns:xbl="http://www.mozilla.org/xbl">
  <binding id="ctrlTab-preview" extends="chrome://global/content/bindings/button.xml#button-base">
    <content pack="center">
      <xul:stack>
        <xul:vbox class="ctrlTab-preview-inner" align="center" pack="center"
                  xbl:inherits="width=canvaswidth">
          <xul:hbox class="tabPreview-canvas" xbl:inherits="style=canvasstyle">
            <children/>
          </xul:hbox>
          <xul:label xbl:inherits="value=label,crop" class="plain"/>
        </xul:vbox>
        <xul:hbox class="ctrlTab-favicon-container" xbl:inherits="hidden=noicon">
          <xul:image class="ctrlTab-favicon" xbl:inherits="src=image"/>
        </xul:hbox>
      </xul:stack>
    </content>
    <handlers>
      <handler event="mouseover" action="ctrlTab._mouseOverFocus(this);"/>
      <handler event="command" action="ctrlTab.pick(this);"/>
      <handler event="click" button="1" action="ctrlTab.remove(this);"/>
#ifdef XP_MACOSX
# Control+click is a right click on OS X
      <handler event="click" button="2" action="ctrlTab.pick(this);"/>
#endif
    </handlers>
  </binding>
</bindings>