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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 (72)
40,210 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 (156)
41,765 users

lolifox - Fierr MOD Requires Restart

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

Rated 5 out of 5 stars (26)
3,182 users

Font Finder (revived)

Get all CSS styles of selected text

Rated 5 out of 5 stars (12)
7,779 users

Restart

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

Rated 5 out of 5 stars (68)
27,581 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 (11)
281 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 (24)
4,168 users

Full Screen for Firefox

Go full screen with one click on the button.

Rated 5 out of 5 stars (10)
1,001 users

Open With Google Chrome

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

Rated 5 out of 5 stars (38)
10,749 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)
4,828 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 (9)
312 users

usi (User|Unified Script Injector)

use UserScripts on your Firefox for Android with usi!

Rated 5 out of 5 stars (30)
2,069 users

Android Text Reflow

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

Rated 5 out of 5 stars (11)
2,070 users

TabsInForeground

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

Rated 5 out of 5 stars (21)
1,654 users

Tabs Backup

Adds the Export/Import Tabs menu items

Rated 5 out of 5 stars (7)
1,176 users

Close Tab Button

Adds an ×-PageAction to close the tab

Rated 5 out of 5 stars (11)
24,536 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 (7)
293 users

DarkenBackground

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

Rated 5 out of 5 stars (16)
1,706 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)
1,228 users

AntiGameOrigin v6

AntiGameOrigin - the other OGame experience for all communities.

Rated 5 out of 5 stars (10)
12,089 users