Top-Rated Extensions

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Video Mouse Wheel

Use wheel mouse on videos to control video/audio/quality.
Choose flash/HTML5 on YouTube, autopause on background tabs, embedded videos.
And much more!

Rated 4 out of 5 stars (8)
141 users

printplus Requires Restart

PDF export support by Gecko.
https://github.com/hATrayflood/printplus

Rated 4 out of 5 stars (5)
513 users

docked JS-Console Requires Restart

docks the JS-Console to the Bottom of the Browser

feel free to have a look at the source (see below) and suggest enhancements (borstel33 web de , Subject: docked JS-Console)

Rated 4 out of 5 stars (10)
63 users

easy Xdebug Requires Restart

This addon was built to make debugging while using netbeans PHP easier.

Rated 3 out of 5 stars (40)
2,841 users

Gmail S/MIME Requires Restart

Send and receive signed and encrypted messages in Gmail.

Rated 3 out of 5 stars (48)
1,703 users

AutoPager Fixed Requires Restart

AutoPager Fixed is a working version of AutoPager extension for Firefox 36+ (non-E10s mode) to autoload the next page(s) when you scroll pages.

ATTENTION: DISABLE THE ORIGINAL AUTOPAGER ADDON!

Rated 3 out of 5 stars (52)
7,473 users

Safe for Amoled

Darkens the background of the page

Rated 3 out of 5 stars (21)
296 users

PageTweak - Ad Blocker, Video Downloader, Translator...

The Ultimate Webpage Enhancer! Instantly add many tweaks to any webpage including: Ad block, flash block, video download, remove delays, tooltip translation, link checker, rounded corners, auto pagerize, and more. A must have for all web users.

Rated 3 out of 5 stars (23)
1,458 users

Colorific

Colorize entire web pages. Configure themes using sliders and drag-and-drop. Set domain preferences for automatic coloration.

Rated 4 out of 5 stars (10)
776 users

log2stas LiveJournal Add-on Requires Restart

a) Auto-expand comments threads b) Copy a fragment of text or link to a picture to LJ editor from other pages. c) Simplify use of lj-cut d) Allow quickly switch between anonymous and normal browsing.

Rated 4 out of 5 stars (6)
154 users

Cycle Collector Analyzer, about:ccdump

Display the graph created by cycle collector. Open "about:ccdump" page after the installation.

Rated 4 out of 5 stars (6)
124 users

Find Image Copies Requires Restart

The Find Image Copies Firefox extension helps you quickly find image copies. Search for image copies straight from the right-click menu in any website.

Rated 5 out of 5 stars (2)
345 users

Stylish Tools Requires Restart

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 4 out of 5 stars (3)
1,051 users

Add-on Preferences Button

Displays a menu that allows you to open the option/preference window for any add-on that has one.

Rated 5 out of 5 stars (2)
283 users

SyncKolab Requires Restart

SyncKolab can synchronize your calendar, address book and tasks against an IMAP server in Kolab formats version 1 (vCard/iCal) or version 2 (XML) or turn your Thunderbird/Lightning into a native Kolab Client (http://kolab.org).

Rated 3 out of 5 stars (77)
4,232 users

Character Palette Requires Restart

Firefox toolbar for selecting strange characters that are not on my keyboard.

Rated 3 out of 5 stars (13)
454 users

Profile Buttons

A button to be able to open the profile folder, along with two buttons to create profiles, and also switch the current profile.

Rated 4 out of 5 stars (8)
1,149 users

1-click Online Document View Requires Restart

Open DOC, DOCX, PDF, PPT, PPTX and TIFF files linked in any webpage directly with Google Docs viewer using "1-click Online Document View", with a single left-click of your mouse / trackpad!!

Rated 4 out of 5 stars (5)
1,352 users

CensureBlock Requires Restart

This addon blocks sites containing pornographic materials.

Rated 3 out of 5 stars (74)
4,351 users

Add-ons Button

Opens the Add-ons window to perform tasks on your installed Extensions, Themes, Plug-ins and Language packs.

Rated 4 out of 5 stars (4)
1,420 users