Top-Rated Extensions

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Enhanced Middle Click

Display history menu, tab list menu, bookmarks menu, toggle tab groups, panorama or various sidebars with middle mouse button.

Rated 5 out of 5 stars (38)
626 users

Tile Tabs Requires Restart

Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.

Rated 5 out of 5 stars (259)
71,884 users

Download Manager (S3) Requires Restart

View and manage downloads from a tidy statusbar

This is a new life in Firefox 26+ for old well-known addon Download Statusbar

New Features: Replace Downloads Library page.
Now you have full control of your downloads history!

Rated 5 out of 5 stars (304)
95,713 users

A Bit Better RTM Requires Restart

Small improvements for Remember The Milk interface (original greasemonkey script "A Bit Better RTM" - http://userscripts.org/scripts/show/32518)

Rated 5 out of 5 stars (32)
587 users

BioLegend Immunology Tools Requires Restart

Welcome to BioLegend's Firefox Addon. This addon contains the latest information on Human and Mouse CD Molecules from the HLDA Workshop, Information on Cytokines and Chemokines, Pathway Posters, All the Latest News from BioLegend, and more...

Rated 5 out of 5 stars (11)
99 users

ModMovil Extension Requires Restart

Este plugin está pensado y diseñado para facilitar la navegabilidad por el foro modmovil.com; de manera tal que el foro este accesible a un simple click de distancia.

Rated 5 out of 5 stars (11)
1 user

Biobar Requires Restart

A power browsing toolbar for the Life Sciences (Biology/Bioinformatics/Medicine). Easily search and retrieve data from over 45 bioinformatics services from the comfort of the toolbar. Links to bioinformatics tools and resources.

Rated 5 out of 5 stars (11)
1,539 users

SettingSanity Requires Restart

Re-adds the options to disable Images, JavaScript, and the Tab Bar in about:preferences and the Options window.

Rated 5 out of 5 stars (48)
6,359 users

Saved Password Editor Requires Restart

Adds the ability to create and edit entries in the password manager.

Rated 5 out of 5 stars (236)
93,228 users

Gutscheine-Live.de Vouchers Requires Restart

Mit dem Gutscheinfinder von Gutscheine-Live.de verpassen Sie keine Gutscheine mehr. Sobald Sie einen Shop betreten, zu dem ein Gutschein oder eine Sonderaktion in unserem System hinterlegt ist, werden Sie automatisch benachrichtigt.

Rated 5 out of 5 stars (65)
1,170 users

Add-ons Manager - Version Number

Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.

Rated 5 out of 5 stars (20)
1,841 users

ConQuery Requires Restart

Context searching for everyone and URL manipulation tool for advanced users...

Rated 5 out of 5 stars (38)
264 users

NoScript Security Suite Requires Restart Featured

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

Rated 5 out of 5 stars (1,609)
2,183,374 users

SSleuth

How strong is your HTTPS connection? SSleuth ranks an established SSL/TLS connection and gives a brief summary of the cipher suite, certificate and other SSL/TLS parameters.

Rated 5 out of 5 stars (13)
5,538 users

Mandarin Popup Requires Restart

Popup chinese dictionary for English-speakers learning Mandarin.

Rated 5 out of 5 stars (23)
587 users

Mason Requires Restart

This extension can simplify the rule to just specify the URI and Content type and can enable/disable each rule separately.
What's more, it can customize the web pages by user scripts which is similar to Grease Monkey.

Rated 5 out of 5 stars (67)
4,729 users

TED the Toolbar Requires Restart

A toolbar to monitor your real-time electric use. Requires TED, the Energy Detective and TED Footprints API, products of Energy, Inc. The toolbar now supports both the TED 1000 and 5000 series energy monitors.

Rated 5 out of 5 stars (14)
201 users

Ziftr Alerts (formerly FreePriceAlerts)

You do the shopping. We'll do the searching. It's that simple.

Rated 5 out of 5 stars (23)
3,516 users

Rainbow Color Tools Requires Restart

Color tools for web development.

Color picker and eyedropper + saving colors and trying out colors with drag and drop.

Rated 5 out of 5 stars (97)
27,111 users

ipFlood Requires Restart

Simulate the use of a series of proxy changing at each new connection.

Rated 5 out of 5 stars (33)
177,459 users