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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 (220)
38,936 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 (11)
24,322 users

Tab Memory Usage Featured

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

Rated 4 out of 5 stars (46)
27,297 users

Video Downloader Prime Compatible with Firefox 57+ Featured

Easily download most popular video formats.

Rated 4 out of 5 stars (67)
43,757 users

Tab Reloader (Page Reloader) Compatible with Firefox 57+ Featured

An easy-to-use tab reloader with custom reloading time settings for individual tabs

Rated 4 out of 5 stars (23)
4,757 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 (247)
70,036 users

Download YouTube Videos as MP4 Featured

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 (499)
943,814 users

Duplicate Tabs Closer Featured

Detects and automatically closes duplicate tabs.

Rated 4 out of 5 stars (48)
6,969 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)
4,063 users

User-Agent Switcher Featured

Quickly and easily switch between popular user-agent strings.

Rated 4 out of 5 stars (36)
59,214 users

Greasemonkey Requires Restart Featured

Customize the way a web page displays or behaves, by using small bits of JavaScript.

Rated 4 out of 5 stars (1,082)
996,987 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)
33,311 users

HTTPS Everywhere Requires Restart Featured

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

Google™ Translator Lite Compatible with Firefox 57+ Featured

a powerful tool to translate words or sentences

Rated 4 out of 5 stars (41)
37,965 users

Reverse Image Search Compatible with Firefox 57+ Featured

Capture, Reverse Image Search is a powerful capturing reverse image search tool built on top of TinEye engine.

Rated 4 out of 5 stars (13)
12,304 users

Emoji Cheatsheet Featured

A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook.
Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard.

Rated 4 out of 5 stars (45)
50,344 users

Popup Blocker (strict) Compatible with Firefox 57+ 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 (42)
22,075 users

Instant Translate: Ultimate Translator Compatible with Firefox 57+ Featured

Translator, dictionary and text-to-speech for 103 languages. Select and translate on any page with a shortcut on double-click.

Rated 4 out of 5 stars (107)
19,823 users

Clean Uninstall Featured

Uninstall an extension and clean its fingerprints (such as stored preferences)

Rated 5 out of 5 stars (24)
7,048 users

Tab Scope Requires Restart Featured

Preview and navigate tab contents through popup.

Rated 4 out of 5 stars (451)
82,162 users