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To must occur only once
This add-on changes all but the first "to" to "cc" if there are multiple "to" when replying to an email.
InsertSignature
Insert signature helps you to insert usually used text by your customization.
Pywalfox
Dynamic theming of Thunderbird using your Pywal colors.
https://github.com/Frewacom/pywalfox
Snakes by Bluemods
Classic Snakes game at your fingertips.
Snakes by Bluemods is a free-to-play single-player classics arcade game designed and developed by Justin Gates at Bluemods.com. The game allows the players to maneuver a snake made up of tiny squares.
Spellchecker Rumantsch Vallader
Spellchecker Rumauntsch Puter
CloneMessage
When composing an email, CloneMessage allows you to duplicate the current state of the email.
Seams
Seams provides some integration with Patchwork, the patch tracking system. It makes the patch state visible directly from Thunderbird. It also displays useful links to a Patchwork instance or to mail archives, and commands to apply the patch locally.
AWO Zipper 2
Dieses addon ist eine interne Entwicklung der AWO Bonn/Rhein-Sieg. Sie sollte nur auf betriebseigenen Geräten installiert werden.
Voraussetzungen: Es müssen 7-zip und die AWOZipperNativeComponent installiert sein!
Thread in same folder
Runs after junk classification and filtering to make sure a newly-received message lands in the same folder as its parent in a thread.
Compose Responsive Images
When writing new emails, newly inserted images are made responsive by setting style="max-width:100%" and removing width/height attributes.
Dino Game
Open Google Chat
Adds an icon on the spaces toolbar to quickly open Google Chat.
Not affiliated with Google.
ThunderbirdBravoClick2Call
Make a call to the selected phone number. Call the public numbers shown on the site via the BRAVO UCC SOLUTION platform by clicking or highlighting them
Hawk (Like ChatGPT in your emails)
Hawk for Thunderbird is an AI-powered plugin designed to generate clear and personalized emails, translate content, fix grammar errors, and streamline your email communication workflow.
Inoreader Thunderbird Add-on
A simple add-on with a button in the Spaces toolbar.
Requires an account a inoreader.com
Daily Reports
This plugin lets you store different profiles with CC, To, Subject and Signature values. Perfect if you need to send emails with similar details often.
Have I Been Pwned? - Easy Reach
An extension for Thunderbird that allows you to access Have I Been Pwned.
Diola-Fogny spell checker
Requires Restart
Diola-Fogny spell checker that recognizes about 19000 of the most common words.
Diola-Kasa spell checker
Requires Restart
Diola-Kasa spell checker that recognizes more than 16,000 common words.
To create your own collections, you must have a Mozilla Add-ons account.
