The 25 most popular Firefox add-ons 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.

137,757 results. Page 1 of 5511.
uBlock Origin
#1, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,549)
7,815,774
uBlock Origin
#2, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,540)
7,806,002
uBlock Origin
#3, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,549)
7,815,774
uBlock Origin
#4, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,549)
7,815,774
uBlock Origin
#5, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,549)
7,815,774
uBlock Origin
#6, uBlock Origin
uBlock Origin
Raymond Hill
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
4.79 (17,549)
7,815,774
Adblock Plus
#7, Adblock Plus
Adblock Plus
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).
4.44 (10,505)
3,804,717
Easy Screenshot
#8, Easy Screenshot
Easy Screenshot
Mozilla Online
Capture a screenshot of the whole webpage, and save in your desktop in default.
3.89 (707)
3,240,372
AdBlocker Ultimate
#9, 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 (24,292)
2,262,917
Language: English (US)
#10, Language: English (US)
Language: English (US)
Mozilla Firefox
Firefox Language Pack for English (US) (en-US)
4.15 (756)
2,193,530
Video DownloadHelper
#11, Video DownloadHelper
Video DownloadHelper
mig
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
4.26 (26,609)
1,952,561
Language: English (GB)
#12, Language: English (GB)
Language: English (GB)
Mozilla Firefox
Firefox Language Pack for English (GB) (en-GB)
3.72 (918)
1,773,711
Language: English (CA)
#13, Language: English (CA)
Language: English (CA)
Mozilla Firefox
Firefox Language Pack for English (CA) (en-CA)
4.23 (66)
1,644,246
DuckDuckGo Privacy Essentials
#14, 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.
4.36 (2,111)
1,545,889
Privacy Badger
#15, Privacy Badger
Privacy Badger
EFF Technologists
Automatically learns to block invisible trackers.
4.80 (2,420)
1,223,421
AdBlock for Firefox
#16, AdBlock for Firefox
AdBlock for Firefox
AdBlock
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.
4.29 (3,212)
1,178,587
Dark Reader
#17, 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 (5,571)
1,159,200
AdGuard AdBlocker
#18, 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 (5,657)
1,047,995
Ghostery – Privacy Ad Blocker
#19, 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 (4,166)
1,044,608
To Google Translate
#20, 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 (3,469)
1,016,122
Facebook Container
#21, Facebook Container
Facebook Container
Mozilla Firefox
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.
4.46 (3,952)
988,225
Cisco Webex Extension
#22, Cisco Webex Extension
Cisco Webex Extension
Cisco WebEx
Join Webex meetings using Firefox ™
2.88 (313)
978,644
Language: Deutsch (German)
#23, Language: Deutsch (German)
Language: Deutsch (German)
Mozilla Firefox
Firefox Language Pack for Deutsch (de) – German
4.14 (1,109)
962,813
Language: Français (French)
#24, Language: Français (French)
Language: Français (French)
Mozilla Firefox
Firefox Language Pack for Français (fr) – French
4.14 (1,163)
920,109
Language: Français (French)
#25, Language: Français (French)
Language: Français (French)
Mozilla Firefox
Firefox Language Pack for Français (fr) – French
4.14 (1,163)
920,109
137,757 results. Page 1 of 5511.