Top-Rated Extensions

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Identity Chooser

Identity Chooser helps you to always use the correct identity when composing a new email.

Rated 5 out of 5 stars (92)
7,946 users

bioFOX

Bioinformatics tools on Mozilla based browsers

Rated 5 out of 5 stars (20)
397 users

Console²

Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.

Rated 5 out of 5 stars (48)
9,412 users

S3.Google Translator

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 (212)
236,885 users

Irvine ContextMenu

Downloads links and images with Irvine.

Rated 5 out of 5 stars (25)
6,604 users

rikaichan

Japanese to English/German/French/Russian dictionary. Just hover the mouse on top of a word, and a popup appears. Automatically de-inflects verbs and adjectives. Detailed kanji view...

Rated 5 out of 5 stars (88)
47,797 users

Screengrab (fix version)

Screengrab! saves webpages as images.
0.98 released!
New features: upload to internet

Rated 5 out of 5 stars (255)
135,448 users

NoScript Security Suite 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 (1,495)
2,091,434 users

Addons Manager Hilite No Restart

Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.

Rated 5 out of 5 stars (18)
848 users

SmartTemplate4

SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.

Rated 5 out of 5 stars (49)
16,224 users

QuickNote

A simple note-taking extension.

Rated 5 out of 5 stars (168)
24,180 users

PrefBar

The all in one toolbar(item). Houses and manages bigger amounts of buttons (Clear Cache, Clear Cookies, ...), Menus (User Agent spoof...) and checkboxes (Javascript, Flash, ...). Extensible from online-database or with self created buttons.

Rated 5 out of 5 stars (39)
15,315 users

Web Developer

The Web Developer extension adds various web developer tools to the browser.

Rated 5 out of 5 stars (215)
519,915 users

Keyword Search No Restart

Search in the awesome bar without changing your search engine.

Rated 5 out of 5 stars (80)
11,814 users

Form History Control

Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller.

Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.

Control for which webpage form history is saved or not.

Rated 5 out of 5 stars (77)
26,213 users

MinimizeToTray For FF 3.5

MinimizeToTray For firefox 3.Minimizes Mozilla windows into the system tray.Note:I am going to remove this extension if the original creator make a FF 3 version!

Rated 5 out of 5 stars (121)
1,986 users

Element Hiding Helper for Adblock Plus No Restart

Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

Rated 5 out of 5 stars (458)
712,714 users

Show Parent Folder

Show Parent Folder in list view of Library.

Rated 5 out of 5 stars (108)
7,406 users

Extended Link Properties + (obsolete)

This application extends the Link Properties and displays File Size, Last Modified Date, Content Type and HTTP Header of a link...
Warning: developing discontinued, see least

Rated 5 out of 5 stars (14)
991 users

iMEGA No Restart

This add-on is intended to ease the life of the regular MEGA user.

Please note this extension is NOT the official from Mega, for the real one please go to: https://mega.nz/#firefox

Rated 5 out of 5 stars (12)
15,757 users