Top-Rated Extensions

Subscribe

Add-on Update Checker Requires Restart

Adds Tools menu item to check Add-ons for updates. Includes toolbar icon.

Rated 4 out of 5 stars (56)
11,778 users

WOT Play Replay Requires Restart

Данное приложение расширяет возможности сайта wotreplays.ru

Rated 5 out of 5 stars (1)
221 users

Scrapbook X CopyPageInfo Requires Restart

Copies the information from ScrapBook data items.

Rated 5 out of 5 stars (1)
637 users

Quick Locale Switcher 2 Requires Restart

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 5 out of 5 stars (1)
1,244 users

Słownik synonimów PL Requires Restart

Adds to browser Polish synonyms dictionary from package LibreOffice.

Rated 5 out of 5 stars (1)
166 users

Open With Vivaldi Browser

Open With Vivaldi Browser sends pages from Mozilla Firefox to Vivaldi browser.

Rated 5 out of 5 stars (1)
182 users

Duplicate Tab Blocker

Prevent duplicate tabs. Allow only one tab for a url. If you click a link that is already opened in a tab, then existing tab would be focused instead of opening a new tab. This works even across firefox windows.

Rated 3 out of 5 stars (11)
754 users

TheRealURL Requires Restart

Get URL information: expand short URLs, get title and content type information without visiting the site.

UPDATE, AUG 2013: THIS EXTENSION IS NO LONGER SUPPORTED. The source is open - if you wish to take on the development, you're welcome.

Rated 3 out of 5 stars (7)
407 users

No More .org

No More .org prevents Firefox from loading websites with .org in the URL. This add-on was made for testing in Firefox

Rated 3 out of 5 stars (3)
1 user

superbar Requires Restart

superaddon!

Rated 3 out of 5 stars (3)
7 users

Clines Requires Restart

Clines, a little game

Rated 3 out of 5 stars (3)
37 users

About:about Button

A button that lists all the about pages that exist. Some of these pages are also provided as separate buttons.

Rated 3 out of 5 stars (4)
311 users

WebPG for Mozilla Requires Restart

An extension which provides GnuPG/GPG/PGP related functions to Moizilla Firefox, Thunderbird and Seamonkey

Rated 3 out of 5 stars (24)
2,442 users

CSHelper Requires Restart

This extension packages versions of the CamStudio recorder application and the XVID Codec. It is primarily intended to be used with the screen capture feature of the Video DownloadHelper add-on, when on Windows.

Rated 3 out of 5 stars (16)
19,161 users

fairBlock

Un bloqueur de publicité équitable. Préservez le web gratuit en choisissant sur quels sites vous bloquez la publicité.

Rated 3 out of 5 stars (3)
236 users

TotalSpoof

Set most common Firefox user-agent and window.navigator values.

Rated 3 out of 5 stars (3)
635 users

Clear Cache and Data

Clears the browser cache and other selected storage.

Rated 3 out of 5 stars (3)
3,159 users

PreviousPage Requires Restart

Shows previous page in the sidebar.

Rated 4 out of 5 stars (2)
10 users

ZoneMinder Client Requires Restart

ZoneMinder Client is a Firefox Extension that provides toolbar buttons and other features to help you when connecting to your ZoneMinder Server.

Rated 4 out of 5 stars (2)
634 users

RequestPolicy v0.5 Legacy Requires Restart

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Rated 3 out of 5 stars (5)
1,419 users