uBlacklist
Blocks sites you specify from appearing in Google search results
31,470 users
Open in PDF Reader
Adds a context menu item to send PDF links directly to a PDF viewer like Adobe Acrobat Reader
31,462 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!
31,322 users
Buster: Captcha Solver for Humans
Save time by asking Buster to solve captchas for you.
31,096 users
RetailMeNot Deal Finder™️
RetailMeNot Deal Finder™️ automatically finds the best promo codes and cash back as you shop online.
30,889 users
Youtube Audio
Stream just the audio from YouTube to save bandwidth and battery life
30,832 users
alerabat.com | kupony i cashback
Nigdy więcej nie szukaj kodów rabatowych – My zrobimy to za Ciebie :)
30,784 users
TubeBuddy
The #1 Rated Firefox Extension for YouTube Creators.
30,613 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.
30,554 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.
30,520 users
Custom Scrollbars
Give Firefox a personal touch with customized scrollbars!
30,014 users
Privacy Extension For WhatsApp™ Web
The Privacy Extension For WhatsApp™ Web hides your messages from unwanted glimpses until you hover over them. In the search bar, you can disable the blur effect on all messages manually and specify what elements to blur.
29,873 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.
29,718 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.
29,600 users
Disable WebRTC
WebRTC leaks your actual IP addresses from behind your VPN, by default.
29,278 users
Strict Pop-up Blocker
Quickly toggle between blocking all pop-up windows and allowing some pop-ups
29,130 users
Mailvelope
Enhance your webmail provider with end-to-end encryption. Secure email communication based on the OpenPGP standard.
29,093 users
Dark Mode
Dark theme and night shift mode for every website. Care your eyes, use Dark Mode for night and daily web browsing.
28,997 users
Song Identifier
Music recognition. Like shazam or soundhound.
28,630 users
VPN add-on
Anonymous, secure and unrestricted VPN service! Unblock websites and access unlimited content with a free VPN by uVPN
28,565 users
View Image
Re-implements the google image, "View Image" button.
28,364 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.
28,191 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.
28,001 users
Webmail Ad Blocker
Remove advertising clutter from your web-based email. Expand your viewable area by blocking and removing ads on the right-hand side of the screen when using Gmail, Hotmail, Outlook.com and Yahoo Mail.
27,864 users
Ronin Wallet
A wallet for Sky Mavis's Ronin sidechain
27,844 users