uBlock Origin
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
7,928,391 users
Adblock Plus
One of the most popular free ad blockers for Firefox. Block annoying ads on sites like Facebook, YouTube and all other websites. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
3,875,595 users
Easy Screenshot
Capture a screenshot of the whole webpage, and save in your desktop in default.
3,499,423 users
AdBlocker Ultimate
Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.
2,298,838 users
Language: English (US)
Firefox Language Pack for English (US) (en-US)
2,259,794 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
1,982,616 users
Language: English (GB)
Firefox Language Pack for English (GB) (en-GB)
1,826,612 users
Language: English (CA)
Firefox Language Pack for English (CA) (en-CA)
1,692,203 users
DuckDuckGo Privacy Essentials
Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.
1,567,594 users
Privacy Badger
Automatically learns to block invisible trackers.
1,238,137 users
AdBlock for Firefox
The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.
1,201,515 users
Dark Reader
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
1,172,114 users
AdGuard AdBlocker
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
1,060,572 users
Ghostery – Privacy Ad Blocker
Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.
1,058,129 users
To Google Translate
Right-click a section of text and click the Translate icon next to it to text translate or listen to it in your language.
1,037,917 users
Cisco Webex Extension
Join Webex meetings using Firefox ™
1,023,685 users
Facebook Container
Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
1,003,433 users
Language: Deutsch (German)
Firefox Language Pack for Deutsch (de) – German
998,782 users
Language: Français (French)
Firefox Language Pack for Français (fr) – French
949,878 users
Honey
Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK.
832,685 users
821,570 users
Grammarly: AI Writing and Grammar Checker App
Improve your writing with Grammarly's assistance. Get spell check, grammar check, and punctuation check in one tool. Real-time suggestions for improving tone and clarity help ensure your writing makes the impression you want.
804,785 users
Bitwarden Password Manager
At home, at work, or on the go, Bitwarden easily secures all your passwords, passkeys, and sensitive information.
742,882 users
Tampermonkey
Tampermonkey is the world's most popular userscript manager.
705,579 users
Language: Español (ES) (Spanish, Spain)
Firefox Language Pack for Español (ES) (es-ES) – Spanish, Spain
697,970 users