Add-ons
Newest Extensions
Sort by:
WebMyStyles
Style the web your way- provides a GUI that allow web users to change the look-and-feel of arbitrary web pages to something more pleasant and accessible.
OrderAtt
Requires Restart
OrderAtt allows you to re-order the attachments list.
Master Password+
Requires Restart
Various enhancements for build-in "master password" (MP)
-Locks master security device on demand or after specified time
-Prompts for MP on browser startup
-Suppresses all or duplicate MP prompts
-Locks up entire application or individual windows
Prevent Delete
Requires Restart
Prevent deletion of messages with a defined tag.
DOM Inspector Plus! [dm]
Requires Restart
Improved DOM Inspector! [dm version]. Box Model new layout & more data, see screenshot!. Horizontal scroll for Dom-Tree, and some more.
Inspects the structure and properties of a window and its contents.
Splash! (Compatible version of Firefox 4)
Requires Restart
Adds a splash screen. Supported in Firefox, Flock, Thunderbird, Sunbird, eMusic Remote, Songbird and Sunbird.
Restartless 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.
Last Message
Requires Restart
Navigate the folder to the last message in the moment the folder is opened.
Markov Dictionary Switcher
Requires Restart
Based on Dictionary Switcher but more than a thousand times faster and you can choose dictionaries that you want to use. Detects the language of the message that you are composing and changes the spelling dictionary.
Montezooma
Requires Restart
Montezooma is a Thunderbird Addon that adds zooming functionality to windows.
ExQuilla for Exchange
Thunderbird email accounts connecting to Microsoft Exchange Web Services.
Navigation Shortcuts
Requires Restart
This extension adds three shortcuts to Thunderbird to navigate more easily.
These shortcuts are: Focus message pane, go one folder up and go one folder down
ThunderBridge
Hidden Archive Prefs
Requires Restart
Exposes hidden archiving preferences that allow the user to choose whether or not they want to keep the current directory structure when archiving and if they want to create folders yearly or monthly (or just keep it in one folder).
Subject Cleaner
Requires Restart
Remove extra strings from the subject while composing the message.
about:support
Requires Restart
A Mozilla Messaging addon to assist in product support.
PLUGIN NO LONGER BEING MAINTAINED
Requires Restart
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Personasizer
Personasizer allows you to expose more of your persona's header image. Useful for personas that have text or an important part of their content cut off by the browser's navigation elements.
To create your own collections, you must have a Mozilla Add-ons account.
