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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.
Old (classic) Icons
This replaces the new monochrome icons with the old/classic colorful icons. Uses the code from Phoenity Icons and the graphics from older Thunderbird versions.
Open Google Tabs
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
RemindMe
Moves email into Inbox/RemindMe folder, and moves it back into Inbox after chosen time.
Two Dynamic Birds
An extension of the "Two Little Birds" and "Dracula" themes that includes a toggle button to turn on dark mode.
The position of the light/dark toggle button can be customised to avoid it covering the cute birds!
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.
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.
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)
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.
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.
Diccionario Papiamento
Bambara/Bamanakan
Bambara spell-checker / Vérificateur orthographique pour le bambara / Bamanankan fililatilennanVérificateur disponible également comme Extension de la suite Libre Office
To create your own collections, you must have a Mozilla Add-ons account.
