User Interface

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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 (152)
41,294 users

Restart

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

Rated 5 out of 5 stars (65)
28,601 users

lolifox - Fierr MOD Requires Restart

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

Rated 5 out of 5 stars (26)
3,439 users

Enhancer for YouTube™

One of the best extensions for YouTube™. All the features you need to make YouTube™ more awesome!

Rated 5 out of 5 stars (56)
42,108 users

Font Finder (revived)

Get all CSS styles of selected text

Rated 5 out of 5 stars (11)
7,304 users

Open With Google Chrome

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

Rated 5 out of 5 stars (17)
11,264 users

ScrollAnywhere

Emulates dragging scrollbar with your middle mouse button anywhere on the page (in all directions).

Compatible with the new Electrolysis e10s multiprocess Firefox version!

It's super lightweight and fast (no additional libraries were used).

Rated 5 out of 5 stars (9)
274 users

Dorando keyconfig Requires Restart

A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)

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

Rated 5 out of 5 stars (31)
4,903 users

Smarter Scrolling Featured

Flick your finger quickly up or down to scroll right to the top or bottom of the page

Rated 5 out of 5 stars (21)
4,503 users

Who is Hosting this Website?

Who is Hosting This Website is a free Add-on service for telling you- where websites are being hosted. "Who is Hosting this Website?" will also determine and display the IP address, DNS records and domain name ownership information (Whois Records).

Rated 5 out of 5 stars (8)
323 users

TabsInForeground

Always open Tabs in foreground. Use system back button to close again.

Rated 5 out of 5 stars (19)
1,756 users

Android Text Reflow

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

Rated 5 out of 5 stars (11)
2,134 users

Zawgyi-One fonts package

-Zawgyi-One script fallback fonts for Firefox (Android edition)
Addon installs Zawgyi-One font (Zawgyi-One.ttf under SIL OFL 1.1 license) that enables proper rendering of
Zawgyi-One script on all sites (Facebook, Twitter, Google, etc.),

Rated 5 out of 5 stars (9)
718 users

Site Searcher

Adds a "Search this site" button to Firefox. When clicked, Google will be opened and search the website you are on.

Rated 5 out of 5 stars (14)
1,333 users

Text Contrast for Dark Themes

Fixes low-contrast text when using a dark desktop theme.

Rated 5 out of 5 stars (12)
1,143 users

DarkenBackground

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

Rated 5 out of 5 stars (15)
1,850 users

Better Twitter Auto-Refresh

This add-on will automatically display new Tweets from Twitter, but only when you are scrolled all the way to the top of your timeline.

Rated 5 out of 5 stars (6)
259 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 4 out of 5 stars (62)
126,088 users

usi (User|Unified Script Injector)

use UserScripts on your Firefox for Android with usi!

Rated 5 out of 5 stars (29)
2,074 users

AntiGameOrigin v6

AntiGameOrigin - the other OGame experience for all communities.

Rated 5 out of 5 stars (7)
12,769 users