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Close on Escape Too
Requires Restart
Updated version of David Winter's Close Tab on Escape, ported to be compatible with Thunderbird 68 and later.
marked-lightning
Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
Aranese spell checker
Custom sync interval for Lightning Calendar
Requires Restart
Allows custom synchronization intervals for remote calendars imported by Lightning Calendar (no fiddling in about:config necessary)
Addon Compatibility Check for TB 102/TB 115/TB 128
Checks all installed add-ons for compatibility with Thunderbird 128 (or TB 102/115) and displays status information on a button in the main toolbar. This button will open a detailed overview, including links to alternatives for abandoned add-ons.
FileLink for Plik
Plik no longer offers uploads without an account. So the add-in currently only works for self-hosted instances of the software. Currently I cannot promise a date for a fix. Sorry.
Just Restart/Quick Quit_TB115!
Requires Restart
Restart TB with Ctrl+Shift+Z or File->Restart.
Quick Quit all TB windows by ctrl-click on main window X
Restart on alt+click main window X
Open error console, debugger, file picker for temporary addon install at TB start (options)
OpenAI Proofreader
This extension uses OpenAI gpt-4o-mini to proofread emails when the user clicks the extension icon.
Usage requires an OpenAI API key. OpenAI does not offer a free usage tier. Proofreading a 4-5 paragraph email costs a fraction of a cent.
Gemini Proofreader
This extension uses Gemini Flash 2.0 to proofread emails when the user clicks the extension icon.
Usage requires a Gemini API key. There is a free usage tier that should be more than adequate for almost every user.
ThunderCalc
A simple calculator for Thunderbird/Sea Monkey/Firefox, available in a pop-up window or a separate tab.
Balochi Spellchecker for UniBal Script
This add-on is a Balochi spellchecker based on the UniBal Balochi script.
This is a pre-beta version as the dictionary has 1000+ words and not all Balochi Affix rules are implemented.
Please use it and give your feedback
Tatar spellchecker dictionary
Tatar dictionary for spell-checking in Firefox and Thunderbird.
Орфографический словарь Firefox и Thunderbird для проверки правописания татарского языка.
Lower Sorbian dictionary
Kiswahili Spell Checker
Babyish spellchecker
Flat Folder Tree (updated)
Flat Folder Tree enables you to selectively breakout sub-folders under intermediate folders in the folder pane view. This is an updated version of the existing addon, now compatible with Thunderbird 60.
Toggle Word Wrap
Requires Restart
Toggle word wrapping and <PRE> element wrapping in the message composition and HTML display windows, respectively. Based on original version by Kaspar Brand.
Open Tab
Sender Domain
Adds optional columns to the messages pane.
Example : "abc@example.com"
* domain column -- "example.com"
* reverse domain column -- "com.example"
Bulk organize your messages by domain (eg. remove spam, back up, separate in folders)
To create your own collections, you must have a Mozilla Add-ons account.
