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Viewhance

Additional functionality for the browser's default image and video viewer.

Rated 4 out of 5 stars (10)
3,708 users
Updated February 20, 2017

UnMHT

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 4 out of 5 stars (235)
95,321 users
Updated February 20, 2017

uBlock Origin

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

Rated 5 out of 5 stars (870)
3,329,844 users
Updated February 19, 2017

Flagfox

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Rated 5 out of 5 stars (683)
467,045 users
Updated February 19, 2017

PlayFlash 64bit Requires Restart

Flash player plugin - unofficial xpi repack for 64bit browsers. Use when official plugin installer is not suitable. All binary files are copyrighted by their authors and distributed for free.

Rated 5 out of 5 stars (9)
11,144 users
Updated February 19, 2017

PlayFlash 32bit Requires Restart

Flash player plugin - unofficial xpi repack for 32bit browsers.
Use when official plugin installer is not suitable.
All binary files are copyrighted by their authors and distributed for free.

Rated 5 out of 5 stars (19)
10,161 users
Updated February 19, 2017

Web Developer Requires Restart

The Web Developer extension adds various web developer tools to the browser.

Rated 5 out of 5 stars (259)
436,411 users
Updated February 18, 2017

QuickPasswords Requires Restart

Retrieve your Passwords the quick way! Never retype or display your secure passwords on screen anymore - put the password where you need it - the login form or the clipboard.

Now also includes SSO change (multi-domain pw) and Backup + Restore.

Rated 5 out of 5 stars (53)
5,699 users
Updated February 18, 2017

Proxy Privacy Ruler

Restrict Proxy by Private Windows, Tabs and Domain List

Rated 5 out of 5 stars (15)
7,596 users
Updated February 18, 2017

EPUBReader Requires Restart

With EPUBReader you can read ePub files just in Firefox. No additional software needed!

Rated 5 out of 5 stars (191)
388,137 users
Updated February 17, 2017

Private Tab

Adds private tabs.

Rated 5 out of 5 stars (243)
66,338 users
Updated February 17, 2017

Active Stop Button Requires Restart

Stop gif animation with button, context menu or Esc key

Rated 4 out of 5 stars (42)
4,694 users
Updated February 17, 2017

Theme Font & Size Changer

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 (178)
107,304 users
Updated February 17, 2017

Messenger for Facebook™

Messenger for Facebook™ lets you bring a Messenger right into your browser to chat with your friends.

Rated 5 out of 5 stars (42)
26,377 users
Updated February 17, 2017

Password Tags Requires Restart

Adds metadata and sortable tags to the password manager.

Rated 5 out of 5 stars (11)
2,342 users
Updated February 17, 2017

ColorfulTabs Requires Restart

The first addon you should be installing on a fresh Firefox install. A must have. The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color.

Rated 4 out of 5 stars (1,029)
218,606 users
Updated February 16, 2017

YouTube Flash Video Player

YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player.

Rated 5 out of 5 stars (54)
275,732 users
Updated February 15, 2017

Simple Locale Switcher Requires Restart

An easier management of the user interface language

Rated 5 out of 5 stars (9)
26,498 users
Updated February 15, 2017

Cookies Exterminator

Auto delete cookies and localStorage objects as soon as they become unused

Rated 5 out of 5 stars (4)
1,131 users
Updated February 14, 2017

Download YouTube Videos as MP4

An extension that adds direct links to download YouTube videos as MP4 and FLV. It has a simple interface and it downloads videos directly from YouTube. The extension integrates with YouTube's interface and adds a download button below the player.

Rated 4 out of 5 stars (469)
1,088,807 users
Updated February 14, 2017