suite/themes/classic/communicator/sidebar/sidebarBindings.xml

<?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="sidebarBindings"
          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="sbtab" extends="xul:button">
    <content>
      <xul:image class="sbtab-twisty" xbl:inherits="selected"/>
      <xul:label class="sbtab-label" xbl:inherits="value=label,accesskey" crop="right"/>
      <xul:spacer flex="1"/>
      <xul:image class="sbtab-texture"/>
    </content>
  </binding>

</bindings>