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Dorando keyconfig Requires Restart

A modified Dorando's tool to rebind keys in Mozilla apps. It is designed to be a drop-in replacement, and will keep your old settings. (See details for upgrade instructions.)

As of version 2016.2, Custom keys (using custom JavaScript) works again!

Rated 5 out of 5 stars (20)
2,309 users

JSONovich

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

Rated 4 out of 5 stars (36)
9,810 users

Dark Background and Light Text

Makes every page (or only pages that you want) to have light text on dark background. Exact colors are customizable.

Rated 5 out of 5 stars (75)
18,781 users

Mozilla WebVR Plus

Manages browser preferences for optimal WebVR support, avoiding the need to make about:config changes.

Rated 5 out of 5 stars (2)
3,496 users

MathML-fonts

Fonts for Mozilla's MathML engine.

Rated 5 out of 5 stars (2)
2,280 users

SuperSteam

Improving the Steam User Experience by giving the user information that can help make purchase decisions. We display stats about each game on steam on the store page! Super Steam is based on Enhanced Steam by jshackles. This add-on is 100% free.

Rated 5 out of 5 stars (8)
2,511 users

Pdf Creator

Convert any webpage to a pdf quickly using pdfmage.org service

Please see https://addons.mozilla.org/en-US/firefox/addon/webpage-to-pdf/privacy/ for tracking information related to this addon

Rated 1 out of 5 stars (16)
16,789 users

Yandex.Mail notifier

Tunable notifier for Yandex.Mail with lots of features like panel for quick work with Mail, desktop and sound notifications for new and unread emails, handles emails from all folders, no need to enter your credentials etc.

Rated 4 out of 5 stars (50)
2,353 users

AntiGameOrigin v6

AntiGameOrigin - the other OGame experience for all communities.

Rated 5 out of 5 stars (4)
11,346 users

Simple YouTube to MP3/MP4 Converter and Downloader

Download youtube videos as mp3/mp4/ogg/webm fast and easy! Adding mirrors everyday to decrease any downtime! We monitor comments and work to fix any problems as soon as possible!

Rated 5 out of 5 stars (35)
107,263 users

Restart Requires Restart

"Restart" menu and button, with configurable shortcut key.

Rated 5 out of 5 stars (55)
25,916 users

usi (User|Unified Script Injector)

use UserScripts on your Firefox for Android with usi!

Rated 5 out of 5 stars (14)
1,227 users

Open With Google Chrome

Open With Google Chrome sends pages from Mozilla Firefox to Google Chrome.

Rated 4 out of 5 stars (6)
11,835 users

Redirect Bypasser

Avoid redirects and has direct access to the sites you want to visit.

Rated 4 out of 5 stars (36)
10,900 users

URLFilter

Block advertisement and access to adult sites

Rated 4 out of 5 stars (15)
3,885 users

DarkenBackground

replace white or very bright background on webpages with slightly darker colors

Rated 5 out of 5 stars (8)
1,492 users

Android Text Reflow

Allow click events to reflow text to fit screen width after zoom events

Rated 5 out of 5 stars (5)
1,453 users

ExHentai Easy 2

When accessing exhentai.org the user is presented with a photo of a sad panda. Access to the site is restricted to users of the sister site http://forums.e-hentai.org whom must manually copy their IPB cookie. This plugin automates this process.

Rated 4 out of 5 stars (18)
60,240 users

Fit Text To Width

Fits text on most web pages to the width of your phone, automatically and quickly.

Rated 5 out of 5 stars (9)
1,604 users

Reaction Packs for Facebook

Swap out Facebook's reactions for something a little more fun!

INSTRUCTIONS:
1) Click "Add to Firefox" to install the extension.
2) Open http://www.reactionpacks.com/ in a new tab and select a Pack.
3) Refresh your Facebook tab.
4) Enjoy!

Rated 4 out of 5 stars (10)
5,765 users