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 (137)
39,825 users

lolifox - Fierr MOD Requires Restart

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

Rated 5 out of 5 stars (27)
3,591 users

Restart

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

Rated 5 out of 5 stars (62)
29,110 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 (50)
43,712 users

Font Finder (revived)

Get all CSS styles of selected text

Rated 5 out of 5 stars (11)
7,205 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)
229 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 (30)
4,610 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)
284 users

TabsInForeground

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

Rated 5 out of 5 stars (17)
1,791 users

Lightweight Themes Switcher Featured

Change the Lightweight Themes easily from the menu.

Rated 5 out of 5 stars (16)
1,963 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 (14)
4,751 users

DarkenBackground

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

Rated 5 out of 5 stars (15)
1,882 users

Android Text Reflow

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

Rated 5 out of 5 stars (8)
2,097 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 (13)
1,409 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)
263 users

MUA Web Unicode Converter

It is a Firefox addons that will check web content and convert to Unicode encoded text if they are Zawgyi. It use Parabaik Converter and Myanmar Font Tagger Script(by Ko Thant Thet Khin Zaw).

Rated 5 out of 5 stars (11)
1,118 users

usi (User|Unified Script Injector)

use UserScripts on your Firefox for Android with usi!

Rated 5 out of 5 stars (26)
2,075 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 (14)
3,535 users

Simple Gmail Notes

Add notes to email threads in Gmail.

Rated 5 out of 5 stars (7)
453 users

Automatic Reader View

Automatically load webpages in Firefox's Reader View – as the default for the websites you specify.

Rated 5 out of 5 stars (10)
1,055 users