Firefox for Android is a full-featured browser with one key differentiator: it supports extensions. Here's how to get the most out of it. Extensions on Firefox Android Unlike Chrome/Chromium-based Android browsers, Firefox runs real desktop extensions on Android (as of Firefox 79+ with the rebuilt Fenix engine). To install extensions: tap the three-dot menu → Add-ons → Browse all Firefox extensions. Key extensions that work on Android: uBlock Origin — The full des...