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Last selected message
The add-on remembers the last selected message in visited folders. After restarting Thunderbird, when we enter the previously visited folder, this message will be displayed, just like in Microsoft Outlook.
Microsoft To Do - Quick Access
Quick Access to Microsoft To Do (Live) in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.
Open Google Tabs
PrioMailbox
PrioMailbox helps you prioritize your Thunderbird inbox by automatically tagging and highlighting important emails. Trainable tags organize your inbox efficiently, saving time and reducing distractions, with a simple, user-friendly interface.
SentAutoMove
Advanced Composer
Creates message templates with variable support, quote header in Ms Outlook style, signatures, custom attachment info for cloud files, and more.
Clear History Button
ThunderWebTabs
Opens Google Keep, Google Photos, Android Messages or any other website in Thunderbird's tab.
Users who encounter "Browser not supported errors" should try changing their User Agent. For more details, please visit the "Support site".
Change Link Appearance
BestReply
BestReply is an add-on that aims to improve users’ experience by providing quick services to the user such as summarization of emails, response generations, as well as a smart chat with our AI model based on the email they are reading.
Pushover Notifier
Send a Pushover notification when a new email arrives.
Plugin requires a Pushover account.
This plugin is not affiliated with or endorsed by Pushover. It was created independently. Use at your own risk.
Hide Email Folders
Hide Email Folders from the Folder pane (Left pane).
Note: This addon only works for Unified pane/folder mode.
Note #2: Please note that this addon only hide email folders and NOT local folders!
Special thanks to John Bieling, C-E and Alex Cabal.
Spacebar Clicker
With Spacebar Clicker, gamers can now test their spacebar speed within the browser. Every gamer can install the extension and practice to increase how many times they press the spacebar.
Dictionnaire Moore
Le dictionnaire Moore / Moor Gom-Biis No-Tũur Gʋlsg Sebre : "Burkina Faso" Edition mars 2015 Cemie.
Belarusian spellchecking dictionary (Taraškievica orthography)
Requires Restart
Belarusian spellchecking dictionary (Taraškievica orthography)
Беларускі слоўнік праверкі артаграфіі (клясычны правапіс)
DancingMouse for Thunderbird3
Requires Restart
It's supposed to give Thunderbird 3 the same look and feel as Firefox 3.
GaelSpell Seanchló
Seo é an gnáthlitreoir GaelSpell, ach leis na consain bhuailte ḃ, ċ, ḋ, ḟ, ġ, ṁ, ṗ, ṡ, ṫ in ionad bh, ch, srl. An-oiriúnach do Twitter!
Church Slavonic Spelling Dictionary
The spelling dictionary is based on the Hunspell spelling dictionary for Church Slavonic (Church Slavic). Numerals only from 1 to 9999 are recognized.
Dancing Mouse Human Thunderbird 2 theme for Ubuntu
Requires Restart
DancingMouseHuman is the DancingMouse theme by Martin Picek with some icons change that makes this theme to fit more the Ubuntu's default theme called Human.
This theme works with Thunderbird 2.
Kashubian Spell Checker (Poland)
This Spell Checker may help writers verify correctness of their Kashubian spelling. It works under Firefox, Thunderbird, and SeaMonkey.
Nen werifikator kaszëbsczégò pisënkù mòże ùżëwac pòd Firefoksã, Thunderbird, ë SeaMonkey.
To create your own collections, you must have a Mozilla Add-ons account.
