Page 0 of 6 of Firefox add-ons with Featured badge in Firefox Browser Add-ons

Add-ons (also known as extensions) are small programs that run inside web browsers like Mozilla Firefox. They add extra features to the browser without having to download anything new. You can use extensions to make browsing faster, easier, and safer. Some extensions even let you do things like translate text on websites, search the web, and play games.

There are over 28,000 Firefox-addons and 480,000 themes, making it hard to find the best ones. so we have created a way to sort through all of them. Use the dropdown above to set different filters. Add-ons are sorted by number of active users.

To set even more advanced filters, and sort the Firefox add-ons differently, please visit our Advanced search tool. Note that Advanced search tool is only available to premium members.

133 results. Page 1 of 6.
uBlock Origin
#1, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,460)
7,821,955
uBlock Origin
#2, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,460)
7,821,955
uBlock Origin
#3, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,460)
7,821,955
uBlock Origin
#4, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,460)
7,821,955
uBlock Origin
#5, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,460)
7,821,955
uBlock Origin
#6, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,459)
7,821,955
AdBlocker Ultimate
#7, AdBlocker Ultimate
AdBlocker Ultimate
AdAvoid
Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.
4.78 (24,095)
2,310,892
Video DownloadHelper
#8, Video DownloadHelper
Video DownloadHelper
mig
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
4.26 (26,350)
1,966,453
DuckDuckGo Privacy Essentials
#9, DuckDuckGo Privacy Essentials
DuckDuckGo Privacy Essentials
DuckDuckGo
Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.
4.35 (2,091)
1,586,017
Privacy Badger
#10, Privacy Badger
Privacy Badger
EFF Technologists
Automatically learns to block invisible trackers.
4.80 (2,414)
1,231,968
Dark Reader
#11, Dark Reader
Dark Reader
Dark Reader Ltd
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
4.53 (5,533)
1,157,921
Ghostery – Privacy Ad Blocker
#12, Ghostery – Privacy Ad Blocker
Ghostery – Privacy Ad Blocker
Ghostery
Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.
4.30 (4,158)
1,062,926
AdGuard AdBlocker
#13, AdGuard AdBlocker
AdGuard AdBlocker
Adguard Software Ltd
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
4.70 (5,628)
1,056,228
To Google Translate
#14, To Google Translate
To Google Translate
Juan Escobar
Right-click a section of text and click the Translate icon next to it to text translate or listen to it in your language.
4.07 (3,459)
1,043,837
Bitwarden Password Manager
#15, Bitwarden Password Manager
Bitwarden Password Manager
Bitwarden Inc.
At home, at work, or on the go, Bitwarden easily secures all your passwords, passkeys, and sensitive information.
4.77 (7,817)
729,396
Return YouTube Dislike
#16, Return YouTube Dislike
Return YouTube Dislike
Dmitry Selivanov
Returns ability to see dislike statistics on youtube
4.74 (4,006)
627,461
Easy Youtube Video Downloader Express
#17, Easy Youtube Video Downloader Express
Easy Youtube Video Downloader Express
Dishita
A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.
4.20 (14,021)
598,465
AdBlocker for YouTube™
#18, AdBlocker for YouTube™
AdBlocker for YouTube™
AdblockLite
Remove all annoying ads from YouTube.
4.05 (1,031)
460,417
SponsorBlock - Skip Sponsorships on YouTube
#19, SponsorBlock - Skip Sponsorships on YouTube
SponsorBlock - Skip Sponsorships on YouTube
Ajay (SponsorBlock)
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
4.80 (2,229)
431,936
Grammar and Spell Checker - LanguageTool
#20, Grammar and Spell Checker - LanguageTool
Grammar and Spell Checker - LanguageTool
LanguageTooler GmbH
With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
4.73 (3,880)
347,724
Simple Translate
#21, Simple Translate
Simple Translate
sienori
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
4.68 (1,848)
310,674
Search by Image
#22, Search by Image
Search by Image
Armin Sebastian
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
4.63 (1,441)
309,862
NoScript Security Suite
#23, NoScript Security Suite
NoScript Security Suite
Giorgio Maone
The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.
4.40 (2,196)
307,497
Decentraleyes
#24, Decentraleyes
Decentraleyes
Thomas Rientjes
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
4.80 (1,415)
266,434
Cookie AutoDelete
#25, Cookie AutoDelete
Cookie AutoDelete
CAD Team
Control your cookies! This WebExtension is inspired by Self Destructing Cookies. When a tab closes, any cookies not being used are automatically deleted. Keep the ones you trust (forever/until restart) while deleting the rest. Containers Supported
4.58 (1,437)
225,702
133 results. Page 1 of 6.