Anzahl Unterordner und Lesezeichen im Ordner anzeigen.

(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 (typeof this.options.extraClasses.entry == "string") {
          aPopup._endOptOpenAllInTabs.classList.add(
            this.options.extraClasses.entry
          );
        }
        if (typeof this.options.extraClasses.footer == "string") {
          aPopup._endOptOpenAllInTabs.classList.add(
            this.options.extraClasses.footer
          );
        }
        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 = menuitemCount + " Link";
        if (menuitemCount != 1) {
          label += "s";
        }
        label += " / " + menuCount + " Ordner."
        if (menuitemCount == 1) {
          label += " -> Link in Tab öffnen."
        } else if (menuitemCount > 1) {
          label += " -> Links in Tabs öffnen."
        }

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

  let intId = setInterval(function() {
    if (window.PlacesViewBase) {
      clearInterval(intId);
      setFunction();
    }
  }, 500);

})();



(function() {

  if (!window.gBrowser)
    return;

  function setFunction() {

    PlacesViewBase.prototype._onPopupShowing = function PVB__onPopupShowing(aEvent) {

      let popup = aEvent.originalTarget;
      this._ensureMarkers(popup);
      if ("_delayedRemovals" in popup) {
        while (popup._delayedRemovals.length) {
          popup.removeChild(popup._delayedRemovals.shift());
        }
      }
      if (popup._placesNode && PlacesUIUtils.getViewForNode(popup) == this) {
        if (!popup._placesNode.containerOpen) {
          popup._placesNode.containerOpen = true;
        }
        if (!popup._built) {
          this._rebuildPopup(popup);
        }
        this._mayAddCommandsItems(popup);
      }

      /* original function end */

      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++;
              }
            }
          }
          if (!item.labelOriginal) {
            item.labelOriginal = item.label;
          }
          item.labelSuffix = '  ' + menuitemCount + ' / ' + menuCount;
          item.label = item.labelOriginal + item.labelSuffix;
        }, 100);
      }

      popup.addEventListener('popuphidden', function onPopuphidden(event) {
        if (event.target != this)
          return;
        popup.removeEventListener('popuphidden', onPopuphidden);
        for (let item of popup.children) {
          if (item.localName == 'menu') {
            if (item.labelOriginal) {
              item.label = item.labelOriginal;
              item.labelOriginal = undefined;
            }
          }
        }
      });

    }

  }

  let intId = setInterval(() => {
    if (window.PlacesViewBase) {
      clearInterval(intId);
      setFunction();
    }
  }, 500);

})();