You can disable notifications globally. I did it. Zero regrets. My browser is a ...

You can disable notifications globally. I did it. Zero regrets. My browser is a hypertext document viewer, not an operating system.

Here's also a userscript that removes the service worker API from Chromium browsers:

    // ==UserScript==
    // @name         Remove service worker API
    // @namespace    http://tampermonkey.net/
    // @version      0.1
    // @description  try to take over the world!
    // @author       You
    // @match        https://*/*
    // @grant        none
    // @run-at       document-start
    // ==/UserScript==
    
    delete Object.getPrototypeOf(navigator).serviceWorker;

In Firefox, iirc you can disable that API somewhere in about:config.