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 (449)
764,813 users

Personas Plus

Personas are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite Personas.

Rated 3 out of 5 stars (955)
376,124 users


Adds some tools to import and export folders and messages

Rated 4 out of 5 stars (126)
342,867 users

Provider for Google Calendar

Allows bidirectional access to Google Calendar

Rated 4 out of 5 stars (1,024)
317,337 users

Download Status Bar No Restart

If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.

Rated 5 out of 5 stars (332)
251,170 users

MinimizeToTray revived

Minimizes windows into the system tray.

Rated 4 out of 5 stars (311)
247,176 users

SQLite Manager

Manage any SQLite database on your computer.

Rated 5 out of 5 stars (39)
201,955 users

Extra Folder Columns Featured

This extension is for those TB3 users who want the multiple-columns view that TB2 allowed

Rated 4 out of 5 stars (242)
171,078 users

DOM Inspector

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Rated 5 out of 5 stars (65)
140,895 users

JavaScript Debugger

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

Rated 4 out of 5 stars (50)
137,040 users

Toolbar Buttons No Restart

Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.

Rated 4 out of 5 stars (313)
134,016 users

Signature Switch Featured

Switch the signature on/off or choose a new one from your predefined set...

Rated 4 out of 5 stars (169)
90,490 users

UnMHT No Restart

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 5 out of 5 stars (217)
84,978 users


Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.

Rated 4 out of 5 stars (275)
81,970 users

Exif Viewer

Displays the Exif and IPTC data in local and remote JPEG images.

Rated 4 out of 5 stars (83)
69,114 users

FoxClocks No Restart

FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.

Rated 4 out of 5 stars (311)
67,973 users

Google Calendar Tab

Adds the Google Calendar web interface as a new tab directly into Thunderbird. Creating and viewing events works just as it would in a browser like Firefox

Rated 4 out of 5 stars (79)
63,790 users

MR Tech Toolkit

(Formerly Local Install) The primary goal of this extension is to provide the tools needed to install and manage extensions and themes locally and tons of other features.

Note: With Toolkit 6.0 Auto Archiving is fully working in Firefox 2.0 and temp...

Rated 4 out of 5 stars (143)
51,700 users


It adds some options to launch easily other profiles and the Profile Manager.

Rated 4 out of 5 stars (62)
47,578 users

Restartless Restart No Restart

This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.

Rated 5 out of 5 stars (181)
44,431 users