Tampermonkey script to remove unread notification count from tab titles

remove-title-notifications.user.js

// ==UserScript==
// @name         remove-title-notifications
// @namespace    distractions
// @version      0.1
// @description  Tampermonkey script to remove unread notification count from tab titles
// @author       Viswanath Sivakumar
// @match        */*
// @grant        none
// ==/UserScript==

// Match titles of the form "(3) Gmail" and replace with "Gmail".
function removeCountFromTitle() {
    const re = /^\(\d+\)\s*(.*)/;
    const match = re.exec(document.title);
    if (match !== null) {
        document.title = match[1];
    }
}

// Execute `func` when changes to `domElementName` occurs.
function runOnMutation(domElementName, func) {
    var observer = new MutationObserver(function(mutations, observer) {
        observer.disconnect(); // Pause observer to avoid possible infinite recursion
        func();
        observer.observe(target, config); // Resume observing
    });

    var target = document.querySelector(domElementName);
    var config = { childList: true };
    observer.observe(target, config); // Start listening for mutations
}

(function() {
    'use strict';

    // Replace original title
    removeCountFromTitle();

    // Watch for changes to title DOM element
    runOnMutation('title', removeCountFromTitle);
})();