// nsIToolkitProfileService.selectProfile can be used only during the selection
// of the profile in the ProfileManager. If we are showing about:profiles in a
// tab, the selectedProfile returns the default profile.
// In this function we use the ProfD to find the current profile.
function findCurrentProfile() {
  let cpd;
  try {
    cpd = Cc["@mozilla.org/file/directory_service;1"]
            .getService(Ci.nsIProperties)
            .get("ProfD", Ci.nsIFile);
  } catch (e) {}

  if (cpd) {
    let itr = ProfileService.profiles;
    while (itr.hasMoreElements()) {
      let profile = itr.getNext().QueryInterface(Ci.nsIToolkitProfile);
      if (profile.rootDir.path == cpd.path) {
        return profile;
      }
    }
  }

  // selectedProfile can trow if nothing is selected or if the selected profile
  // has been deleted.
  try {
    return ProfileService.selectedProfile;
  } catch (e) {
    return null;
  }
}

//
try {
    var Cc = Components.classes, Ci = Components.interfaces;
    var text = `@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
@-moz-document url("chrome://browser/content/browser.xul") {
    #PanelUI-menu-button > stack > .toolbarbutton-icon,
    #PanelUI-menu-button > .toolbarbutton-icon {
        -moz-binding: url("data:text/xml,<bindings 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='name'><implementation><field name='button'>document.getElementById('PanelUI-menu-button');</field><constructor><![CDATA[ var Cc = Components.classes, Ci = Components.interfaces, cpd; try { cpd = Cc['@mozilla.org/file/directory_service;1'].getService(Ci.nsIProperties).get('ProfD', Ci.nsIFile); } catch (e) {} if (!cpd) return; var itr = Cc['@mozilla.org/toolkit/profile-service;1'].createInstance(Ci.nsIToolkitProfileService).profiles; while (itr.hasMoreElements()) { var profile = itr.getNext().QueryInterface(Ci.nsIToolkitProfile); if (profile.rootDir.path == cpd.path) { this.button.label = profile.name; break; } } ]]></constructor></implementation></binding></bindings>#name") !important;
    }

    #PanelUI-menu-button > .toolbarbutton-text {
        display: -moz-box !important;
        -moz-box-ordinal-group: 0 !important;
    }
}`;
    var sss = Cc["@mozilla.org/content/style-sheet-service;1"].getService(Ci.nsIStyleSheetService);
    var nis = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
    var uri = nis.newURI("data:text/css;charset=utf-8," + encodeURIComponent(text), null, null);
    if (!sss.sheetRegistered(uri, sss.AGENT_SHEET))
        sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);
} catch(e) {}