Featured Extensions

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QuickMark Featured

A quick and minimalistic way to create bookmarks.

Rated 5 out of 5 stars (50)
12,090 users

History Submenus II Featured

Add sub-menus to History Menu for previous days' history.

Rated 5 out of 5 stars (49)
4,165 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 (161)
40,102 users

YouTube No Buffer (Stop Autoplaying) Featured

A bulletproof approach to prevent YouTube from buffering videos

Rated 4 out of 5 stars (26)
15,055 users

Desktop Messenger for WhatsApp™ Featured

WhatsApp™ Desktop provides an easy access to WhatsApp Web, and notifies you of incoming posts.

Rated 4 out of 5 stars (66)
82,098 users

DownThemAll! Featured

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

Rated 4 out of 5 stars (1,842)
1,248,471 users

Popup Blocker (strict) Featured

Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address

Rated 4 out of 5 stars (21)
28,048 users

Tab Scope Requires Restart Featured

Preview and navigate tab contents through popup.

Rated 4 out of 5 stars (480)
121,048 users

Ecosia — The search engine that plants trees! Featured

Ecosia is a search engine that donates 80% of its surplus income to planting trees. By searching with Ecosia you can help the environment for free.
This extension adds Ecosia.org as the default search engine to your Firefox. Give it a try!

Rated 5 out of 5 stars (143)
206,807 users

AdBlocker for YouTube™ Featured

AdBlocker for YouTube™ removes all annoying Ads from YouTube

Rated 4 out of 5 stars (37)
337,113 users

Video Downloader Prime Featured

Easily download most popular video formats.

Rated 4 out of 5 stars (37)
54,122 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 (30)
19,184 users

Tab Memory Usage Featured

Tab Memory Usage displays the amount of memory is used by each tab

Rated 4 out of 5 stars (38)
36,151 users

Skype™ Web Featured

Access to Skype Web from within a toolbar panel. You can use this app to call your friends without the need to switch current browser tab

Rated 4 out of 5 stars (5)
2,684 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 (169)
294,137 users

Disconnect for Facebook™ Featured

Facebook™ Disconnect is an efficient firewall to disconnect third-party websites from accessing to your Facebook.

Rated 4 out of 5 stars (10)
28,904 users

User-Agent Switcher Featured

Quickly and easily switch between popular user-agent strings.

Rated 4 out of 5 stars (35)
74,397 users

YouTube High Definition Featured

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 (238)
566,612 users

Privacy Settings Featured

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

Rated 5 out of 5 stars (58)
21,545 users

QuickJava Requires Restart Featured

Allows quick enable and disable of Java, Javascript, Cookies, Image Animations, Flash, Silverlight, Images, Stylesheets and Proxy from the Toolbar. This is great for increasing security or decreasing bandwidth.

Rated 5 out of 5 stars (210)
263,976 users