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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 (966)
169,518 users
Updated June 27, 2017

uBlock Origin

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

Rated 5 out of 5 stars (1,763)
3,819,055 users
Updated June 27, 2017

ReminderFox Requires Restart Featured

ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.

Rated 4 out of 5 stars (486)
58,684 users
Updated June 26, 2017

WebRTC Permissions UI Toggle Requires Restart

A toolbar button for SeaMonkey to bypass the missing WebRTC permissions dialog and temporarily allow media capture.

Not yet rated
9 users
Updated June 23, 2017

Header Tools Lite Requires Restart

Allows to modify the header and the source of messages

Rated 5 out of 5 stars (24)
5,617 users
Updated June 23, 2017

Webmaster SAPE Requires Restart

Toolbar contains a set of functions, which expands the abilities of webmasters and optimizers, when working in the interface of SAPE exchange.

Rated 5 out of 5 stars (168)
4,654 users
Updated June 22, 2017

Web Messenger for WhatsApp™

Web Messenger for WhatsApp™ brings web messenger right into your browser to chat with your friends.

Rated 5 out of 5 stars (7)
19,162 users
Updated June 21, 2017

Toolbar Button for Facebook™

Toolbar Button for Facebook™ lets you visit your favorite Facebook™ quickly and easily by adding a special button to your Toolbar.

Rated 3 out of 5 stars (35)
18,973 users
Updated June 21, 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 (44)
21,047 users
Updated June 21, 2017

YouTube High Definition

YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.

Rated 5 out of 5 stars (233)
464,236 users
Updated June 21, 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 (665)
383,807 users
Updated June 21, 2017

HTTPS Everywhere Requires Restart

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 (185)
367,412 users
Updated June 20, 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 (16)
9,487 users
Updated June 20, 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)
10,289 users
Updated June 20, 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 (63)
219,636 users
Updated June 20, 2017

Bluhell Firewall

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

Rated 5 out of 5 stars (391)
79,383 users
Updated June 20, 2017

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (6)
862 users
Updated June 19, 2017

Save Button for Pinterest

Save images and pages to your Pinterest account quickly and easily with Save Button for Pinterest.

Rated 5 out of 5 stars (21)
71,067 users
Updated June 19, 2017

Reader

Reader is the ultimate Reader tool for Firefox.

Rated 5 out of 5 stars (65)
28,413 users
Updated June 19, 2017

Classic Toolbar Buttons

'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)
33,311 users
Updated June 17, 2017