Newest Extensions
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QuoteCollapse Requires Restart
Collapse and expand quotes.
Contributors: Stanimir Stamenkov, Dillinger
Sender Verification Anti-Phishing Extension Requires Restart
Protects you from phishing attacks by verifying the From: address domain name of emails as you read them. Sender Policy Framework (SPF) and DNS-based reputation lists are used.
RSS Editor Requires Restart
Desktop RSS editor for casual editing of RSS 2.0...
World Weather Requires Restart
Display local weather information from around the...
BiDi Mail UI
Direction control and BiDi-related charset misdetection correction
Timestamp Requires Restart
Inserts the current date/time into a message or an input field in the browser.
Visit my Timestamp site for recent versions and news.
Allow Empty Subject Requires Restart
Allows Thunderbird to send message without a subject.
Visit my Allow Empty Subject site for recent versions and news.
Folderpane Tools Requires Restart
Allows for customization of the folder pane. Accounts can be rearranged and the startup folder can be chosen.
Foobar Controls Requires Restart
Allows you to control the Foobar2000 Mp3 player from the Firefox window...
ConQuery Requires Restart
Context searching for everyone and URL manipulation tool for advanced users...
FlashGot Mass Downloader Requires Restart
Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.
JavaScript Debugger Requires Restart
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.
View Headers Toggle Button Requires Restart
This extension adds a toolbar button that allows the easy toggling of viewing all message headers.
StockTicker Requires Restart
Shows your favorite stocks in a customizable...
Quote Colors Requires Restart
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
addressContext Requires Restart
An extension to add addressbook-related options to the context...
Show SMTP Username Requires Restart
Displays username (if available) next to SMTP...
Delete Junk Context Menu Requires Restart
Adds 'Delete Mail Marked as Junk' to folders' right click...
To create your own collections, you must have a Mozilla Add-ons account.