BlockSite
BlockSite is an extension, which automatically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.
32,602 users
Video Downloader for Facebook
Facebook Video Downloader - Download Facebook Videos. Download Videos directly from Facebook in HD quality with one simple click.
32,351 users
Youtube Audio
Stream just the audio from YouTube to save bandwidth and battery life
32,150 users
32,112 users
Momentum
Replace your new tab page with an all-in-one productivity dashboard. Featuring daily inspiration, focus reminders, to-do lists, local weather info, and more!
31,907 users
RetailMeNot Deal Finder™️
RetailMeNot Deal Finder™️ automatically finds the best promo codes and cash back as you shop online.
31,887 users
uBlacklist
Blocks sites you specify from appearing in Google search results
31,616 users
Custom Scrollbars
Give Firefox a personal touch with customized scrollbars!
31,539 users
New Tab Homepage
A very simple tabbed browsing extension that loads your homepage when you open a new tab. If you have multiple homepages, the first is chosen.
31,035 users
Buster: Captcha Solver for Humans
Save time by asking Buster to solve captchas for you.
30,721 users
TubeBuddy
The #1 Rated Firefox Extension for YouTube Creators.
30,643 users
Ezy Speed Test & Custom Web Search
Add the Ezy Speed Test & Custom Web Search extension and click the favicon on your toolbar to access a speed test site & Yahoo® search.
30,488 users
Mailvelope
Enhance your webmail provider with end-to-end encryption. Secure email communication based on the OpenPGP standard.
30,372 users
Disable WebRTC
WebRTC leaks your actual IP addresses from behind your VPN, by default.
30,056 users
Indie Wiki Buddy
Helping you discover quality, independent wikis! When visiting a Fandom wiki, Indie Wiki Buddy redirects or alerts you of independent alternatives. It also filters search engine results. BreezeWiki is also supported, to reduce clutter on Fandom.
30,021 users
Wayback Machine
Welcome to the Official Internet Archive Wayback Machine Browser Extension! Go back in time to see how a website has changed through the history of the Web. Save websites, view missing 404 Not Found pages, or read archived books & papers.
29,677 users
Strict Pop-up Blocker
Quickly toggle between blocking all pop-up windows and allowing some pop-ups
29,541 users
Runet Censorship Bypass
This extension allows bypassing censorship of Russian government (i.e. only sites blocked by RosKomNadzor, RKN), giving you access to libraries, encyclopedias, oppositional political sites, and to innocent sites blocked to many reasons.
29,412 users
Kee - Password Manager
Save time, sign in easily to websites and avoid the hassle of forgotten password resets. Protect yourself and people you know from the nightmare of your accounts being hacked.
29,370 users
Zamu
Zamu automatically finds coupons, applies the best coupon code at checkout & earns you cashback.
29,228 users
ChatGPT for Google
Display ChatGPT response alongside Google Search results
29,187 users
29,051 users
Český slovník pro kontrolu pravopisu
Slovník pro kontrolu pravopisu pro aplikace Mozilla
29,016 users
Canadian English Dictionary
For some reason, Mozilla doesn't have a Canadian localization team, but I know that even the British dictionary doesn't quite cut it for the truly patriotic.
28,950 users
View Image
Re-implements the google image, "View Image" button.
28,885 users