Featured Extensions See all »
XNote++Rated 5 out of 5 stars(107)Persistent sticky notes for Thunderbird associated to mails.
In TB 78, you can define the note position in the settings. If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.by Lorenz Froihofer, opto
Display Mail User Agent TRated 5 out of 5 stars(14)Displays the mail program with which the selected mail was written
*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.by Toshi
CardBookRated 4 out of 5 stars(338)A new Thunderbird address book based on the CardDAV and vCard standards.
Twitter: @CardBookAddonby Philippe V.
DKIM VerifierRated 4 out of 5 stars(30)Verifies the DKIM-Signature of an e-mail.by Philippe Lieser
AutoarchiveReloadedRated 4 out of 5 stars(15)Automatically archives old mails (Improved version of the orginal Autoarchive Add-on)by Brummolix
SmartTemplatesRated 4 out of 5 stars(72)SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.by Realraven (Axel Grude), Marky Mark DE
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TbSyncRated 5 out of 5 stars(156)TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.by John Bieling
Send LaterRated 5 out of 5 stars(226)True 'Send Later' functionality to schedule the time for sending an email.by Jonathan Perry-Houts, Jonathan Kamens
Provider for CalDAV & CardDAVRated 5 out of 5 stars(37)This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager 'TbSync'. Including iCloud, ownCloud, Nextcloud, Radicale and many more.by John Bieling
Provider for Exchange ActiveSyncRated 5 out of 5 stars(23)Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSyncby John Bieling
Open Google CalendarRated 4 out of 5 stars(61)Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)by Emmanuel ROECKER
Lightning Calendar TabsRated 4 out of 5 stars(15)Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.by jlx84
Thunderbird Email Calendar
Mozilla Thunderbird Calendar Sync With Google
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome.) by Emmanuel ROECKER 28,036 users. Not neccessary to downgrade right now (20131109). Confirmed that everything is back to normal if you upgrade Thunderbird 24.1.0 (not a typo, I repeat: 24.1.0) from Ubuntu repositories and then upgrade your add-ons from within Thunderbird (Tools/Add-ons and 'Check for updates' from the options button next to the add-on search field) or manually by downloading 2.6.2 from here. Thunderbird can also use your mail provider’s spam filters to keep junk mail out of your inbox. Open Source At the heart of Thunderbird is an open source development process driven by thousands of passionate, experienced developers and security experts spread all over the world. Thunderbird can be used to sync your calendars in a common place irrespective of Google, iOS, Yahoo, Windows etc. It can be used as a standalone application to complete sync with your calendars instead of the integrated calendar’s. The normal installation of Thunderbird alone will not allow you to add your calendars.