Extensions are like apps for Firefox.
They add features to Firefox to make browsing faster, safer, or just plain fun.
YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
Some sites may not work with Firefox for Android video background play feature. This add-on provides a quick fix by blocking the Page Visibility API and the Fullscreen API.