uBlock Origin
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
7,876,513 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).
3,776,226 users
Easy Screenshot
Capture a screenshot of the whole webpage, and save in your desktop in default.
2,951,256 users
Language: English (US)
Firefox Language Pack for English (US) (en-US)
2,370,913 users
AdBlocker Ultimate
Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.
2,271,299 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
1,941,887 users
Language: English (GB)
Firefox Language Pack for English (GB) (en-GB)
1,786,219 users
Language: English (CA)
Firefox Language Pack for English (CA) (en-CA)
1,676,622 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.
1,541,757 users
Privacy Badger
Automatically learns to block invisible trackers.
1,230,963 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.
1,198,205 users
Dark Reader
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
1,167,707 users
AdGuard AdBlocker
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
1,058,585 users
Ghostery – Privacy Ad Blocker
Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.
1,041,140 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.
1,012,527 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.
986,508 users
Cisco Webex Extension
Join Webex meetings using Firefox ™
978,476 users
Language: Deutsch (German)
Firefox Language Pack for Deutsch (de) – German
967,561 users
Language: Français (French)
Firefox Language Pack for Français (fr) – French
931,523 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.
817,845 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.
801,465 users
790,346 users
Bitwarden Password Manager
At home, at work, or on the go, Bitwarden easily secures all your passwords, passkeys, and sensitive information.
736,872 users
IDM Integration Module
Download files with Internet Download Manager
706,705 users
Tampermonkey
Tampermonkey is the world's most popular userscript manager.
680,592 users