bookmark_count.uc.js funktioniert im Nightly nicht mehr.

// basiert auf Sript von BrokenHeart
// Firefox 154+

(function() {

	if (!window.gBrowser)
		return;

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

	// Custom icons in profile/chrome/icons folder
	let ProfilePath = PathUtils.toFileURI(PathUtils.join(PathUtils.profileDir, 'chrome', 'icons'));
	let icon1 = "Ordner.png";
	let icon2 = "Bild36.png";
	
	let cs_font_size = 12;
	let cs_font_weight = 700;
	let cs_font_color = "blue";

	// Fix: feste Spaltenbreite (anpassen, wenn du mehrstellig erwartest)
	let colWidthCh = 4;

	function setFunction() {

		const css = `

			#bmContent {
				font-family: "Courier New", monospace !important;
				font-size: ${cs_font_size}px !important;
				font-weight: ${cs_font_weight} !important;

				display: flex !important;
				align-items: center !important;
				justify-content: flex-end !important;

				/* nach rechts drücken innerhalb von menu-text */
				margin-left: auto !important;

				height: 16px !important;
				white-space: nowrap !important;
				margin-top: -14px !important;
			}

			.bmIcon1 {
				width: 16px;
				height: 16px;
				background: url("${ProfilePath}/${icon1}") no-repeat center;
				background-size: 16px 16px;

				/* Icon kommt NACH dem Wert => Abstand links ist das relevante */
				margin-left: 6px;
				margin-right: 0;
				margin-top: -2px;

				flex: 0 0 auto;
			}

			.bmIcon2 {
				width: 16px;
				height: 16px;
				background: url("${ProfilePath}/${icon2}") no-repeat center;
				background-size: 12px 12px;

				margin-left: 6px;
				margin-right: 0;
				margin-top: -2px;

				flex: 0 0 auto;
			}

			.bmValue {
				color: ${cs_font_color} !important;
				flex: 0 0 auto;
				min-width: ${colWidthCh}ch; /* gleiche Flucht über Zeilen */
				text-align: right;
			}

			.bmSlash {
				color: ${cs_font_color} !important;
				margin-left: 3px !important;
				margin-right: -7px !important;
			}

			/* Hover-Farbwechsel */
			menupopup[placespopup="true"] > menu.bookmark-item:hover > .menu-text > #bmContent .bmValue {
				color: red !important;
				fill: red !important;
			}
			menupopup[placespopup="true"] > menu.bookmark-item:hover > .menu-text > #bmContent .bmSlash {
				color: #000 !important;
				fill: #000 !important;
			}
			
		`;

		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 bookMenu = document.getElementById('bookmarksMenu');
		let persToolBar = document.getElementById('PersonalToolbar');

		if (bookMenu) {
			bookMenu.addEventListener('popupshown', 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.hidden = true;
				itemPopup.collapsed = true;
				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++;
						}
					}
				}

				itemPopup.hidden = false;
				itemPopup.collapsed = false;

				let bmCounta = item.childNodes[1];
				bmCounta.innerHTML = "";

				let bmContent = document.createElement("bmContent");
				bmContent.id = "bmContent";

				let strCountOut1 = menuCount;      // Ordner
				let strCountOut2 = menuitemCount;  // Lesezeichen

				// DOM: value1 + Icon1 + "/" + value2 + Icon2
				let v1 = document.createElement("span");
				v1.className = "bmValue";
				v1.textContent = strCountOut1;

				let icon1El = document.createElement("span");
				icon1El.className = "bmIcon1";

				let slash = document.createElement("span");
				slash.className = "bmSlash";
				slash.textContent = "/"; // ohne Leerzeichen

				let v2 = document.createElement("span");
				v2.className = "bmValue";
				v2.textContent = strCountOut2;

				let icon2El = document.createElement("span");
				icon2El.className = "bmIcon2";

				// Ausblenden-Logik: Wenn ein Zähler 0 ist, alles rechts davon konsequent ausblenden
				if (strCountOut1 === 0) {
					v1.style.display = "none";
					icon1El.style.display = "none";
					slash.style.display = "none";
				}
				if (strCountOut2 === 0) {
					v2.style.display = "none";
					icon2El.style.display = "none";
					slash.style.display = "none";
				}

				bmContent.appendChild(v1);
				bmContent.appendChild(icon1El);
				bmContent.appendChild(slash);
				bmContent.appendChild(v2);
				bmContent.appendChild(icon2El);

				bmCounta.appendChild(bmContent);

			}, 100);
		}
	}

})();