Featured Extensions

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New Tab Tools Featured

Customizes the new tab page. Add more tiles. Add the launcher from Firefox start. Have a background image. Set new tile images and titles. See recently closed tabs. And more...

Rated 4 out of 5 stars (217)
44,164 users

Gmail™ Notifier (restartless) Featured

Multiple account (or label) Gmail notifier (without storing passwords)

Rated 4 out of 5 stars (266)
90,386 users

Tab Scope Requires Restart Featured

Preview and navigate tab contents through popup.

Rated 4 out of 5 stars (451)
102,340 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 (32)
17,750 users

Privacy Settings Featured

Alter Firefox's built-in privacy settings easily with a toolbar panel.

Rated 5 out of 5 stars (58)
21,929 users

MailtoWebmails Featured

Tool for managing the default action when you click a "mailto:" link. Specializing in sharing details for Webmail services.

Rated 5 out of 5 stars (14)
4,758 users

Master Password+ Requires Restart Featured

Various enhancements for build-in "master password" (MP)
-Locks master security device on demand or after specified time
-Prompts for MP on browser startup
-Suppresses all or duplicate MP prompts
-Locks up entire application or individual windows

Rated 4 out of 5 stars (131)
24,156 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)
34,029 users

Dictionary (Google™ Translate) Anywhere Featured

"Dictionary (Google™ Translate) Anywhere" extension provides access to a floating multilingual Google Translate panel on any webpage.

Rated 5 out of 5 stars (51)
14,801 users

Instant Translate: Select and Translate Compatible with Firefox 57+ Featured

Translation, text-to-speech, transliteration on pages and in the pop-up for 100+ languages.

Rated 4 out of 5 stars (90)
20,915 users

Smart HTTPS Featured

Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts it back to HTTP.

Rated 4 out of 5 stars (27)
32,457 users

Classic Toolbar Buttons Featured

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions.

Beta builds on versions page!

Rated 5 out of 5 stars (132)
37,230 users

Panel View for Google™ Keep Featured

A handy and reliable extension designed to store your notes, lists and photos.

Rated 5 out of 5 stars (23)
11,449 users

Adblock Plus Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (5,121)
17,443,461 users

QuickMark Featured

A quick and minimalistic way to create bookmarks.

Rated 5 out of 5 stars (51)
11,492 users

AdBlocker for YouTube™ Compatible with Firefox 57+ Featured

AdBlocker for YouTube™ removes all annoying Ads from YouTube

Rated 4 out of 5 stars (60)
311,085 users

Theme Font & Size Changer Featured

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 5 out of 5 stars (170)
110,637 users

DownThemAll! Featured

The first and only download manager/accelerator built inside Firefox!

Rated 4 out of 5 stars (1,754)
1,153,754 users

Tile Tabs Requires Restart Featured

Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.

Rated 5 out of 5 stars (243)
80,111 users

Proxy Switcher Featured

Access to the complete Firefox's proxy settings right from a toolbar panel

Rated 5 out of 5 stars (35)
38,665 users