Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
27,629 users
Simple Translate
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
158,438 users
HTTPS Everywhere
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
686,127 users
Improve YouTube! (Open-Source for YouTube)
Make YouTube tidy & powerful! YouTube Player Size Theme Quality Auto HD Colors Playback Speed Style ad block Playlist Channel H.264
7,843 users
SponsorBlock - Skip Sponsorships on YouTube
Easily skip YouTube video sponsors. When you visit a YouTube video, the extension will check the database for reported sponsors and automatically skip known sponsors. You can also report sponsors in videos. Other browsers: https://sponsor.ajay.app
172,361 users
Unhook: Remove YouTube Recommended Videos Comments
Hide YouTube related videos, comments, video suggestions wall, homepage recommendations, trending tab, and other distractions.
17,964 users
Bitwarden - Free Password Manager
A secure and free password manager for all of your devices.
468,192 users
Decentraleyes
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
234,510 users
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
4,616 users
GIPHY for Firefox
Bring the power of a GIF search engine anywhere on the web. Respond to emails, tweets and more with GIFs quickly and easily. Add GIPHY GIFs to your Gmail, Facebook, Twitter and more. Just search, drag and drop or right click!
9,195 users
Improve YouTube! (Open-Source for YouTube)
Make YouTube tidy & powerful! YouTube Player Size Theme Quality Auto HD Colors Playback Speed Style ad block Playlist Channel H.264
7,843 users
Simple Translate
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
158,438 users