Add-ons
Miscellaneous
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Scriptable Notifications
Allows you to define an external script (bash, batch, python, ...) which is called so you can manage mail notifications / alerts the way you want.
Snap/Flatpak versions of Thunderbird not supported.
Always HTML
Requires Restart
Disable automatic degradation of HMTL mails to plain-text mails.
Hide Menubar
Requires Restart
Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.
NuevaSync Push Email Synchronization
Requires Restart
NuevaSync provides push sync services for email and more for iPhone, Android, and other smartphones. This add-on displays real-time sync status in the Thunderbird status bar, and offers easy NuevaSync account setup using your Thunderbird settings.
Planteen Host Email
Requires Restart
This is the official quick access link for Planteen Host Email. Plenty of FREE extras! Business and Corporate class email. Use your own domain, reliable, secure and access from any device.
pasteCode
Requires Restart
Programmers: want to email some source code to a colleague and have it be actually readable and highlighted just like in your code editor? Well with pasteCode, you can do just that...
No More Install Delay
UPDATE: XPI delay has been removed in Firefox 40!
Disable the install delay in Firefox. New 2.0 version now includes GreaseMonkey scripts!
Unlike similar addons, this works on Firefox 4 and beyond.
SmtpSelect
Requires Restart
A toolbar button providing easy access to choosing the default SMTP server in Thunderbird.
Subject Cleaner
Requires Restart
Remove extra strings from the subject while composing the message.
Check Domain NG
Requires Restart
This is a fork of "Check Domain" addon, which can run on 68 version of Thunderbird.
BlunderDelay
Requires Restart
Thunderbird Extension: AutoSend Unsent Messages. Flushes entire outbox at regular intervals.
Year View
Requires Restart
This is an example extension that adds a simple year view to Sunbird/Lightning.
Note that freebusy information is only provided if all calendars are cached. See long description for more info. Also, Calendar 1.0pre with bug 489590 fixed is required.
Color Source
Requires Restart
Add syntax highlighting of code in various languages to email messages via context menu.
Generate patch command
Requires Restart
Generate a command (or part of it) to send a patch as a reply to a thread − primarily intended for use with `git send-email`
compactfolder
Requires Restart
A toolbar button for compacting/purging the currently-viewed...
File Bug Report
Requires Restart
For testers and developers who submit bug reports: Adds "File Bug Report" command to Tools menu. Opens browser at the Bugzilla enter-bug page in guided format with product and build identifier.
SUNBIRD Button-**32** bit version-for Firefox 4.* and Thunderbird 3.*
Requires Restart
A button to call up the Sunbird Calendar from Firefox and Thunderbird toolbars. This version for 32-bit operating system!
To create your own collections, you must have a Mozilla Add-ons account.
