Most Popular Extensions
Sort by:
Thunderled Requires Restart
For ASUS laptop owners, each time a new email is in your inbox, the email led will switch on...
Mutt Keys Requires Restart
Creates Mutt like key bindings for Thunderbird. Inspired by the mouseless extension.
Stacked Inspector Requires Restart
Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.
Log Helper Requires Restart
This is a basic utility to manage logging from within the application, for help with debugging.
Bugzilla Helper Requires Restart
Quickly reply to your bugmail on bugzilla.mozilla.org without leaving Thunderbird.
InfoLister Requires Restart
Lists installed add-ons (extensions, themes, plugins). Mozilla does not allow me to publish the version compatible with Firefox 48+, see http://forums.mozillazine.org/viewtopic.php?f=48&t=2084957&p=14715558#p14715558 for details.
Color Source Requires Restart
Add syntax highlighting of code in various languages to email messages via context menu.
Cat Attack Quick Button Requires Restart
Easily visit the site for The Cat Attack Fishing Tournament.
rmIncomingDups Requires Restart
rmIncomingDups is a Thunderbird extension that checks if there are duplicate messages across accounts.
When a new mail arrives rmIncomingDups checks according to the rules configured if it finds some duplicates and removes them.
Execute JS Requires Restart
Execute JS is a enhanced JavaScript-Console, where you can comfortably enter and execute arbitrary JavaScript-Code and modify functions...
PackageMapping.com Extension Requires Restart
Track and Map packages from the right-click menu...
Kyrgyz Key Requires Restart
Allows to type Kyrgyz alphabets like Ө,Ң and Ү in any text fields of Firefox Browser, Web Pages and Thunderbird. Converts Latin words into Cyrillic words instantly. Makes EnglishRussian translations.
Viral Threat Level Requires Restart
Adds an image to the status bar indicating the current threat level of the internet. It allows quick access to security information that you can use to help protect yourself, and links to antivirus software comparisons and security extensions.
Keychain Services Integration Requires Restart
Store usernames and passwords in your Mac OS X Keychain.
To create your own collections, you must have a Mozilla Add-ons account.