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Console²

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 (45)
18,471 users

Twitter Address Bar Search No Restart Featured

Mozilla Firefox with Twitter instantly connects you with what's happening in the world. Search people and topics on Twitter using @ and # from the address bar.

Rated 4 out of 5 stars (36)
17,797 users

Copy As Plain Text

Removes formatting from copied text.

Rated 4 out of 5 stars (33)
17,202 users

Vagex Firefox Add-on

Vagex is a view exchange site which will expose your video to thousands of members in order to increase the view count. With our system, YouTube will see all the views your videos are getting and promote it even more, having a sort of viral effect.

Rated 3 out of 5 stars (5)
14,298 users

AutoAuth

AutoAuth automatically submits HTTP authentication dialogs when you’ve chosen to have the browser save your login information.

Rated 4 out of 5 stars (43)
12,817 users

CuteButtons - Crystal SVG

add icons to buttons/menus/anywhere (CuteMenus - Crystal SVG not required)

Rated 4 out of 5 stars (75)
12,092 users

QuickJS

Enable/Disable JavaScript with Toolbar button (incl. Ctlr+Q shortcut).

Rated 4 out of 5 stars (8)
11,795 users

Proxy Mobile

Simple add-on for settings HTTP, SOCKS and SSL proxy settings. Works by default with Orbot: Tor on Android. Developed by the Guardian Project at https://guardianproject.info

Rated 2 out of 5 stars (20)
11,401 users

InfoNotary Configurator for Mozilla

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 5 out of 5 stars (2)
8,930 users

JSONovich No Restart

Pretty-prints JSON content in the browser for easy, unobtrusive viewing.

Rated 4 out of 5 stars (28)
8,716 users

RememberPass No Restart

RememberPass is a Firefox/Firefox Mobile Addon to force browser to remember password even website disable it by default. It's done by set autocomplete to "on" where it's off.
Here is: Test Page

Rated 4 out of 5 stars (11)
6,588 users

TryAgain

TryAgain keeps trying to load a webpage when the server cannot be reached.

Rated 4 out of 5 stars (60)
6,438 users

Sun Cult

Worldwide Sunrise, Sunset, Twilight, Moonrise and Moonset...

Rated 5 out of 5 stars (102)
5,649 users

Delete Cookies on Exit No Restart

Deletes all cookies when Firefox Mobile is closed, preventing sites and web trackers from persisting data across browsing sessions and improving user privacy. This add-on is NOT for Firefox Desktop, which have this feature built-in.

Rated 5 out of 5 stars (4)
5,474 users

Clear Mobile History No Restart Featured

Add a "Clear History" button to the Firefox preferences.

Rated 2 out of 5 stars (5)
5,080 users

AVIM

An input method editor (IME) for Vietnamese. Type fully-accented Vietnamese directly into any Web page or dialog box using a standard keyboard.
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Bộ gõ tiếng Việt để nhập dấu trực tiếp vào bất kỳ trang Web và hộp thoại dùng bàn phím bình thường.

Rated 5 out of 5 stars (26)
4,738 users

Fierr

Replaces the error page with a more stylish appearance with additional features.

Rated 5 out of 5 stars (42)
4,609 users

lolifox - Fierr MOD

Replaces the error page with a lolifox appearance with additional features.

Rated 5 out of 5 stars (17)
4,520 users

Silent Block

Minimum and fast URL blocking by regular expressions.

Rated 5 out of 5 stars (15)
4,357 users

Yahoo Mail Hide Ad Panel No Restart

Permanently hides the Ads panel in the right side of New Yahoo! Mail, the 'Sponsored' email at the Top, and ads at the Left to give you a full-width Premium email experience for free! The other option, of course is to pay $50 a year to Yahoo! Inc. :)

Rated 5 out of 5 stars (18)
4,235 users