Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Power Thesaurus
Use the power of synonyms by button in toolbar, right-click or by word selection on any page.
1,289 users
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
24,034 users
FoxClocks
FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.
10,630 users
Gesturefy
Navigate, operate, and browse faster with mouse gestures! A customizable mouse gesture add-on with a variety of different commands.
88,420 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
85,998 users
LeechBlock NG
LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
110,116 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
683,143 users
Yomitan
Powerful and versatile pop-up dictionary for language learning used by 100,000+ language learners.
28,137 users
PhotoShow
Hover to zoom and view high-definition images. Instantly enlarge visuals, crafted for all your favorite websites—and for you.
11,368 users
Chrome Mask
Makes Firefox wear a mask to look like Chrome to websites that block Firefox otherwise.
42,664 users
Immersive Translate - Translate Website & PDF
Free Translate Website, Translate PDF & Epub eBook, Translate Video Subtitles in Bilingual
85,066 users
