Top-Rated Extensions

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YouTube Video Center

Youtube Video Center changes the new Youtube design and centers the whole Youtube page on the screen automatically.

Rated 5 out of 5 stars (12)
4,434 users

Font Finder (revived)

Get all CSS styles of selected text

Rated 5 out of 5 stars (12)
7,197 users

Developer Edition theme enabler

**/!\ This theme is already built-in Firefox 53 and over /!\**
Enables the DevEdition theme on beta or release, and adds an entry in the Appearance's tab. Uninstalling this add-on removes the DevEdition theme from the add-on manager.

Rated 5 out of 5 stars (50)
10,976 users

JSON-DataView Requires Restart

Displays JSON data in a collapsible tree structure with syntax highlights.

Rated 5 out of 5 stars (12)
2,069 users

Drag-Select Link Text

Select link text with easy mouse gestures.

Rated 5 out of 5 stars (34)
1,384 users

Keyword Search Featured

Search in the address bar without changing your search engine.

Rated 5 out of 5 stars (91)
8,260 users

Screengrab (fix version) Requires Restart

Screengrab! saves webpages as images.
0.99 released!
New features: upload to internet

Rated 5 out of 5 stars (322)
120,893 users

Ageless for YouTube

Watch age restricted YouTube videos without signing in.

Rated 5 out of 5 stars (50)
11,752 users

QuickJava Requires Restart Featured

Allows quick enable and disable of Javascript, Cookies, Image Animations, Flash, Silverlight, Images, Stylesheets and Proxy from the Toolbar. This is great for increasing security or decreasing bandwidth. (Read details for info on Java with FF52+!)

Rated 5 out of 5 stars (211)
249,920 users

Советник Яндекс.Маркета

Находит нужные вам товары и услуги по более выгодной цене

Rated 5 out of 5 stars (15)
19,112 users

Star-Button In Urlbar Requires Restart

Moves star-button back into urlbar.
Make sure to have a bookmarks button replacement installed for still being able to access bookmarks menu. 'Classic Bookmarks Button' or 'Classic Theme Restorer' will do the job.

Rated 5 out of 5 stars (34)
2,604 users

Hoxx VPN Proxy

Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.

Rated 5 out of 5 stars (1,875)
144,908 users

Cards Requires Restart

A collection of patience (i.e. single-player) card games. Included are: Aces Up, Black Widow, Canfield, Demon, Double Klondike, Double Solitaire, Grounds for Divorce, Fan, Forty Thieves, FreeCell, Golf, Gypsy, Klondike, Maze, Mod 3, Montana...

Rated 5 out of 5 stars (65)
350 users

Minggl Requires Restart

Minggl is a social interaction manager. The Minggl toolbar makes it easy to manage information, communication, and navigation across (and independent of) social networks. Minggl adds a "relationship layer" across all your sites.

Rated 5 out of 5 stars (16)
2 users

XE.com Universal Currency Converter � Requires Restart

Lets you perform conversions from your Firefox browser with a large amount of customization including the ability to select a number and convert it using a right-click. This tool is in Beta and no documentation is currently available.

Rated 5 out of 5 stars (16)
26 users

QuickNote Requires Restart

A simple note-taking extension.

Rated 5 out of 5 stars (180)
28,462 users

Console² Requires Restart

Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.

Rated 5 out of 5 stars (49)
6,245 users

Pentadactyl

Firefox for Vim and Links addicts.

Rated 5 out of 5 stars (139)
1,211 users

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)
77,123 users

EasyAccent Requires Restart

Allows entry of accented characters using natural shortcuts.

Rated 5 out of 5 stars (21)
1,487 users