Ein Javascript verhindert das öffnen von Lesezeichen aus der Lesezeichensymbolleiste.

// ==UserScript==
// @name           newtabfromhistory.uc.js
// @namespace      https://www.camp-firefox.de/forum/viewtopic.php?p=1090093#p1090093
// @description    Links aus Chronik in neuem Tab öffnen
// @author         aborix
// @compatibility  139 -
// Zeile 44 + 45 angepasst wegen einer Fehlermeldung in der Konsole
// Zeile 18 + 19 tauschen ab Fx 152
// @version        0.0.4a = 18.06.25
// ==/UserScript==

(function() {

if (location != 'chrome://browser/content/browser.xhtml')

    return;

    PlacesUIUtils.openNodeWithEvent = function PUIU_openNodeWithEvent(aNode, aEvent) {
        // let window = aEvent.target.documentGlobal;
        let window = aEvent.target.ownerGlobal;
        let browserWindow = (window && window.document.documentElement.getAttribute('windowtype') == 'navigator:browser') ? window : BrowserWindowTracker.getTopWindow();
        let where = window.BrowserUtils.whereToOpenLink(aEvent, false, true);
        if (this.loadBookmarksInTabs) {
            if (where == 'current' && !aNode.uri.startsWith('javascript:')) {
                where = 'tab';
                }
            if (where == 'tab' && browserWindow.gBrowser.selectedTab.isEmpty) {
                where = 'current';
            }
        }
        this._openNodeIn(aNode, where, window);
    }

    let onPopupshowing = function() {
        let historyMenu = document.getElementById('history-menu');
        if (!historyMenu._placesView) {
            new HistoryMenu(event);
            historyMenu._placesView._onCommand = function HM__onCommand(aEvent) {
                let placesNode = aEvent.target._placesNode;
                if (placesNode) {
                    PlacesUIUtils.openNodeWithEvent(placesNode, aEvent);
                };
            };
        };
    };

    let historyPopup = document.getElementById('historyMenuPopup');
    historyPopup?.addEventListener('popupshowing', onPopupshowing);

})();