Top-Rated Extensions


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)
85 users

ModMovil Extension Requires Restart

Este plugin está pensado y diseñado para facilitar la navegabilidad por el foro; 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)
1,505 users

Ageless for YouTube

Watch age restricted YouTube videos without signing in.

Rated 5 out of 5 stars (48)
11,297 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)
6,196 users

Select like a Boss

Select link's text just like a regular text (like in Opera'12 browser) - Select like a Boss ;)

Rated 5 out of 5 stars (34)
3,154 users

FavIcon Reloader up to FF 48 only Requires Restart

FavIconReloader reloads Favourite Icons by retrieving information from all bookmarked web sites.

Rated 5 out of 5 stars (155)
23,319 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 (254)
68,270 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 (1,581)
2,106,043 users

Download Panel Tweaker

Some tweaks for built-in download panel

Rated 5 out of 5 stars (37)
6,382 users

ConQuery Requires Restart

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

Rated 5 out of 5 stars (38)
260 users

Mandarin Popup Requires Restart

Popup chinese dictionary for English-speakers learning Mandarin.

Rated 5 out of 5 stars (23)
549 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)
4,892 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)
202 users

Classic Bookmarks Button Requires Restart

Mainly for Firefox 29+!

This add-on restores bookmarks menu known from older Firefox versions on Firefox Australis.

Use 'Customize (Toolbar)' menu to place the new bookmarks button on your favorite toolbar.

Rated 5 out of 5 stars (26)
3,655 users


Add-on for Firefox and Thunderbird. Replaces built-in notifications with the OS native notifications. It supports most Linux Desktop Environments, Windows 8.1 & 10.

Rated 5 out of 5 stars (16)
13,069 users

Secure Password Generator Requires Restart

Easy to use add-on to create random secure passwords.

Rated 5 out of 5 stars (16)
2,089 users

O'Notes Requires Restart

Notes like in Opera 12

Rated 5 out of 5 stars (36)
503 users

Ecosia — The search engine that plants trees! Featured

Ecosia is a search engine that donates 80% of its surplus income to planting trees. By searching with Ecosia you can help the environment for free.
This extension adds as the default search engine to your Firefox. Give it a try!

Rated 5 out of 5 stars (142)
108,865 users

S3.Google Translator Requires Restart Featured

S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.

New Feature: Language learning!

Rated 5 out of 5 stars (380)
368,192 users