addEventListener("dblclick", e=> e.button > 1 && gBrowser.removeCurrentTab(), false, gBrowser);

addEventListener("dblclick", e=> {
   e.button > 1 && gBrowser.removeCurrentTab();
   setTimeout(()=> document.getElementById("contentAreaContextMenu").hidePopup(), 20);
}, false, gBrowser);

function () {
"use strict";

    let result = aTask;
    if (aTask && typeof(aTask) == "function") {
      if (aTask.isAsyncFunction) {
        throw new TypeError(
          "Cannot use an async function in place of a promise. " +
          "You should either invoke the async function first " +
          "or use 'Task.spawn' instead of 'Task.async' to start " +
          "the Task and return its promise.");
      }

      try {
        // Let's call into the function ourselves.
        result = aTask.apply(this, arguments);
      } catch (ex) {
        if (ex instanceof Task.Result) {
          return Promise.resolve(ex.value);
        }
        return Promise.reject(ex);
      }
    }

    if (isGenerator(result)) {
      // This is an iterator resulting from calling a generator function.
      return new TaskImpl(result).deferred.promise;
    }

    // Just propagate the given value to the caller as a resolved promise.
    return Promise.resolve(result);

(({panel}, prefName) => {

    cbu.isPref(prefName, PlacesUtils.unfiledBookmarksFolderId);
    addDestructor(reason => reason == "delete" && Services.prefs.clearUserPref(prefName));

    var popupshownFolderId = Services.prefs.getIntPref(prefName);
    var handler = e => {
        if (e.target != panel) return;
        var id = PlacesUtils.bookmarks.getFolderIdForItem(StarUI._itemId);
        if (e.type == "popupshown") {
            popupshownFolderId = id;
            return;
        }
        if (StarUI._actionOnHide || popupshownFolderId == id) return;
        Services.prefs.setIntPref(prefName, id);
    }
    for(var type of ["popupshown", "popuphiding"]) addEventListener(type, handler, false, panel);

    var src = BookmarkingUI.onCommand.toString();
    var res = src.replace("e(isBookmarked", `$&, isBookmarked || Services.prefs.getIntPref("${prefName}")`);
    var func = eval(`(${res})`).bind(BookmarkingUI);

    addEventListener("command", e => {
        e.stopPropagation();
        func(e);
    }, true, document.getElementById("bookmarks-menu-button"));

})(StarUI, "CB.lastEditBookmarkPanelFolderId");

addEventListener("popupshown", ()=> {
   document.getElementById('editBMPanel_foldersExpander').click();
}, true, document.getElementById("editBookmarkPanel"));