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.

#1, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,587)

7,896,455

#2, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,586)

7,896,455

#3, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,586)

7,896,455

#4, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,586)

7,896,455

#5, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,586)

7,896,455

#6, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,586)

7,896,455

#7, 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 (10,524)

3,839,848

#8, Easy Screenshot

Mozilla Online

Capture a screenshot of the whole webpage, and save in your desktop in default.

3.89 (707)

3,275,079

#9, Language: English (US)

Mozilla Firefox

Firefox Language Pack for English (US) (en-US)

4.14 (757)

2,338,880

#10, 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 (24,352)

2,295,712

#11, Video DownloadHelper

mig

The easy way to download and convert Web videos from hundreds of YouTube-like sites.

4.26 (26,670)

1,968,968

#12, Language: English (GB)

Mozilla Firefox

Firefox Language Pack for English (GB) (en-GB)

3.72 (918)

1,804,311

#13, Language: English (CA)

Mozilla Firefox

Firefox Language Pack for English (CA) (en-CA)

4.23 (66)

1,680,002

#14, 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 (2,120)

1,552,210

#15, Privacy Badger

EFF Technologists

Automatically learns to block invisible trackers.

4.80 (2,424)

1,233,347

#16, 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 (3,220)

1,200,334

#17, 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 (5,579)

1,168,086

#18, AdGuard AdBlocker

Adguard Software Ltd

Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.

4.70 (5,668)

1,062,632

#19, Ghostery – Privacy Ad Blocker

Ghostery

Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.

4.30 (4,171)

1,051,973

#20, 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.

4.06 (3,470)

1,031,579

#21, Language: Deutsch (German)

Mozilla Firefox

Firefox Language Pack for Deutsch (de) – German

4.14 (1,112)

995,480

#22, 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 (3,958)

995,348

#23, Cisco Webex Extension

Cisco WebEx

Join Webex meetings using Firefox ™

2.88 (313)

993,639

#24, Language: Français (French)

Mozilla Firefox

Firefox Language Pack for Français (fr) – French

4.15 (1,164)

929,935

#25, Language: Français (French)

Mozilla Firefox

Firefox Language Pack for Français (fr) – French

4.15 (1,164)

929,935