Skript verhindert Ausführung eines zweiten Skriptes

(function() {

  if (window.__SSi != 'window0')
    return;

  PlacesUIUtils.openTabset = function openTabset(aItemsToOpen, aEvent, aWindow) {
    if (!aItemsToOpen.length)
      return;
    let browserWindow = aWindow &&
      aWindow.document.documentElement.getAttribute("windowtype") == "navigator:browser" ?
      aWindow : BrowserWindowTracker.getTopWindow();
    var urls = [];
    let skipMarking = browserWindow && PrivateBrowsingUtils.isWindowPrivate(browserWindow);
    for (let item of aItemsToOpen) {
      urls.push(item.uri);
      if (skipMarking)
        continue;
      if (item.isBookmark)
        this.markPageAsFollowedBookmark(item.uri);
      else
        this.markPageAsTyped(item.uri);
    }
    var where = browserWindow ?
      browserWindow.whereToOpenLink(aEvent, false, true) : "window";
    if (where == "window") {
      let args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
      let stringsToLoad = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
      urls.forEach(url => stringsToLoad.appendElement(PlacesUtils.toISupportsString(url)));
      args.appendElement(stringsToLoad);
      browserWindow = Services.ww.openWindow(
        aWindow,
        AppConstants.BROWSER_CHROME_URL,
        null,
        "chrome,dialog=no,all",
        args
      );
      return;
    }
    var loadInBackground = (where == "tabshifted");
    browserWindow.gBrowser.loadTabs(urls, {
      inBackground: loadInBackground,
      replace: browserWindow.gBrowser.selectedTab.isEmpty,
      triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
    });
  };

})();

(function() {

    if (!window.gBrowser)
        return;
    
    setTimeout(function() {
        setFunction();
    },50);

    function setFunction() {

        const css =`
            .countClass::after {
                content: attr(data-value); 
                color: white;
            }
        `;

        const sss = Cc['@mozilla.org/content/style-sheet-service;1'].getService(Ci.nsIStyleSheetService);
        const uri = Services.io.newURI('data:text/css,' + encodeURIComponent(css));
        sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);

        let bmbMenu = document.getElementById('bookmarks-menu-button');
        let bookMenu = document.getElementById('bookmarksMenu');
        let persToolBar = document.getElementById('PersonalToolbar');
        
        if(bmbMenu)
            bmbMenu.addEventListener('popupshowing', onPopupShowing ); 
        if(bookMenu)
            bookMenu.addEventListener('popupshowing', onPopupShowing ); 
        if(persToolBar)
            persToolBar.addEventListener('popupshowing', onPopupShowing ); 
    }
    
    function onPopupShowing(aEvent) {
        
        let popup = aEvent.originalTarget;

        for (let item of popup.children) {
            if (item.localName != 'menu' || item.id?.startsWith('history'))
                continue;
            setTimeout(() => {
              let itemPopup = item.menupopup;
              itemPopup.openPopup();
              itemPopup.hidePopup();
              let menuitemCount = 0;
              let menuCount = 0;
              for (let subitem of itemPopup.children) {
                if (subitem.classList.contains('bookmark-item') && !subitem.disabled && !subitem.hidden) {
                  if (subitem.localName == 'menuitem') {
                    menuitemCount++;
                  } else if (subitem.localName == 'menu') {
                    menuCount++;
                  }
                }
              }
              
              let label = item.childNodes[3]; //label.menu-iconic-text
  
              label.classList.add('countClass');
              let strCountOut = "  " + menuCount + "/" + menuitemCount + ""
              label.setAttribute('data-value', strCountOut);

            }, 100);
        }
    }
    
})();

(function() {

  if (!window.gBrowser)
    return;

  function setFunction() {
    PlacesViewBase.prototype._mayAddCommandsItems =
    function PVB__mayAddCommandsItems(aPopup) {
      let hasMultipleURIs = false;
      let menuitemCount = 0;
      let menuCount = 0;
      if (aPopup._placesNode.childCount > 0) {
        for (let item of aPopup.children) {
          if (item._placesNode) {
            if (item.localName == 'menuitem') {
              menuitemCount++;
            } else if (item.localName == 'menu') {
              menuCount++;
            }
          }
        }
        if (menuitemCount > 0 || menuCount > 0) {
          hasMultipleURIs = true;
        }
      }
      if (!hasMultipleURIs)  {
        aPopup.setAttribute("nofooterpopup", "true");
        if (aPopup._endOptOpenAllInTabs) {
          aPopup.removeChild(aPopup._endOptOpenAllInTabs);
          aPopup._endOptOpenAllInTabs = null;
          aPopup.removeChild(aPopup._endOptSeparator);
          aPopup._endOptSeparator = null;
        }
        return;
      }

      aPopup.removeAttribute("nofooterpopup");
      if (!aPopup._endOptOpenAllInTabs) {
        aPopup._endOptSeparator = document.createXULElement("menuseparator");
        aPopup._endOptSeparator.className = "bookmarks-actions-menuseparator";
        aPopup.insertBefore(aPopup._endOptSeparator, aPopup.firstChild);
        aPopup._endOptOpenAllInTabs = document.createXULElement("menuitem");
        aPopup._endOptOpenAllInTabs.className = "openintabs-menuitem";
        if (this.options?.extraClasses?.entry) {
          aPopup._endOptOpenAllInTabs.classList.add(
            this.options.extraClasses.entry
          );
        }
        aPopup._endOptOpenAllInTabs.setAttribute(
          "oncommand",
          "PlacesUIUtils.openMultipleLinksInTabs(this.parentNode._placesNode, event, " +
            "PlacesUIUtils.getViewForNode(this));"
        );
        aPopup._endOptOpenAllInTabs.setAttribute(
          "onclick",
          "checkForMiddleClick(this, event); event.stopPropagation();"
        );
        aPopup.insertBefore(aPopup._endOptOpenAllInTabs, aPopup.firstChild);
      }

      let label = menuCount + " Ordner";
      label += " / " + menuitemCount + " Link"
      if (menuitemCount != 1) {
        label += "s";
      }
      if (menuitemCount == 1) {
        label += " -> Link in Tab öffnen"
      } else if (menuitemCount > 1) {
        label += " -> Links in Tabs öffnen"
      }

      aPopup._endOptOpenAllInTabs.setAttribute("label", label);
    }
  }

  setTimeout(function() {
      setFunction();
  },50);
  
})();