Add-ons
Appearance and Customization
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QuickFilterPlus
Gravatars
Requires Restart
Show a column with the Gravatar-picture and sender-name in email folders.
SanRockstar
Disable about:config
Requires Restart
Disable about:config feature of Firefox and Thunderbird.
Email Addresses in Message Headers
Requires Restart
Shows email addresses in message headers, including those of contacts, and provides control over message header presentation.
Pic Zoom
Contact DnD
Requires Restart
Enables one to assign a photo to a contact by dragging and dropping it from the local filesystem.
Highlight Unread Folders
Requires Restart
This add-on enables highlighting the account names which contain unread messages.
ToggleFullHeaders
Requires Restart
Allows you to customise the message panel buttons to add a "Toggle Headers" button that will switch between showing and hiding the full headers.
ansitel Click-to-Dial Thunderbird
Requires Restart
Click-to-Dial Plugin für ansitel VoIP-Telefonanlagen zum Markieren und Wählen von Rufnummern in Mozilla Thunderbird.
AntiLostFilter
Close last tab with middle-click
THIS ADD-ON IS NOW UNNECESSARY FOR FIREFOX 31 AND UP!
Tired of middle-clicking on the last tab in Thunderbird, only to have nothing happen? This add-on embraces the industry-standard middle-click behavior of IE, Chrome, and Firefox (3.6- and 31+).
UI Text Overrider
Provides ability to override UI elements' label, tooltip text, etc.
Lowercase Email Addresses in Message Headers
Requires Restart
Shows lowercase email addresses in message headers and their tooltips.
Posting Style Enforcer
Requires Restart
Automatically converts top-posted messages to use bottom-positng or vice versa. Interleaved posts are left alone. Detects automatically added text and supports a per-contact list of exceptions.
Switch Message Colour
Requires Restart
Adds a Toolbar-Button to Thunderbird to switch between the mails' original colouring and your user defined colouring.
Disable About Something
Requires Restart
Provides ability to disable "about:*" pages by the configuration.
Hide Badge Icon
Requires Restart
Hides the badge for new messages of the Thunderbird app icon on Mac OSX.
Seturgent
Requires Restart
Sets the urgent flag (X11) of the Thunderbird window under Linux in case of new messages. Does ignore special folders like Drafts, Junk and such.
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