Featured Extensions

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Reverse Image Search Compatible with Firefox 57+ Featured

Capture, Reverse Image Search is a powerful capturing reverse image search tool built on top of TinEye engine.

Rated 4 out of 5 stars (13)
12,122 users

YouTube Enhancer Plus Requires Restart Featured

Improve your watching experience! Ad Blocker, Autoplay Manager, Auto HD, Auto Replay, Cinema Mode, and more.

Rated 5 out of 5 stars (115)
39,422 users

User-Agent Switcher Featured

Quickly and easily switch between popular user-agent strings.

Rated 4 out of 5 stars (36)
58,293 users

OmniSidebar Featured

Bring your bookmarks into view with just a gesture. Move the sidebar across the screen. Open a different sidebar by just clicking its title. And more! Keeps your sidebar simple and quick to access!

Rated 5 out of 5 stars (121)
75,112 users

HTTPS Everywhere Requires Restart Featured

Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.

Rated 4 out of 5 stars (186)
366,914 users

New Tab Override (browser.newtab.url replacement) Featured

This add-on brings back the ability to change the page which is shown when opening a new tab.

Rated 5 out of 5 stars (153)
103,765 users

Bluhell Firewall Featured

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

Rated 4 out of 5 stars (399)
78,375 users

Font Finder Requires Restart Featured

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Rated 4 out of 5 stars (75)
29,878 users

CookieKeeper Featured

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (66)
12,711 users

YouTube No Buffer (Stop Autoplaying) Featured

A bulletproof approach to prevent YouTube from buffering videos

Rated 4 out of 5 stars (28)
11,722 users

QR Code Image Generator Featured

Create a QR Code of the selected text or current URL. Use CTRL-SHIFT-Q to quickly see the QR Code. Also possible to create a QR Code from free text within Firefox. Works completely offline! Now with UTF8 support.

Rated 4 out of 5 stars (35)
15,710 users

uBlock Origin Featured

Finally, an efficient blocker. Easy on CPU and memory.

Rated 5 out of 5 stars (1,770)
3,818,434 users

lesspass Compatible with Firefox 57+ Featured

Use LessPass add-on to generate complex passwords and log in automatically to all your sites

Rated 4 out of 5 stars (11)
5,697 users

DuckDuckGo Plus Featured

DuckDuckGo is the search engine that doesn't track you. This add-on makes DuckDuckGo your default search engine and includes some other useful features.

Rated 4 out of 5 stars (177)
339,540 users

SearchWP Requires Restart Featured

Jump-to-word buttons and highlighting for the search box content

Rated 5 out of 5 stars (145)
18,099 users

Wikipedia Peek Compatible with Firefox 57+ Featured

Shows previews of linked articles on Wikipedia pages.

Rated 4 out of 5 stars (15)
1,588 users

Instant Translate: Ultimate Translator Compatible with Firefox 57+ Featured

Translator, dictionary and text-to-speech for 103 languages. Select and translate on any page with a shortcut on double-click.

Rated 4 out of 5 stars (107)
19,606 users

Menu Wizard Requires Restart Featured

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (188)
106,986 users

Slim Add-ons Manager Featured

The Add-ons Manager slims down!
This add-on reduces the height of entries in the Add-on Manager, so you can display more of them at a time.

Rated 5 out of 5 stars (49)
7,223 users

Emoji Cheatsheet Featured

A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook.
Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard.

Rated 4 out of 5 stars (45)
49,743 users