Thunderbird Add-ons

by Patrick

11 Add-ons in this Collection

Lightning by Mozilla Calendar Project

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.

Provider for Google Calendar by Philipp Kewisch

Rated 4 out of 5 stars 1,001 reviews

274,698 users

Allows bidirectional access to Google Calendar

ThunderBrowse by GS! Networks

Rated 3 out of 5 stars 153 reviews

27,404 users

Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!

Remove Duplicate Messages by Thorsten W. Schmidt

Rated 4 out of 5 stars 115 reviews

43,812 users

If you have duplicate messages (e.g. from merging folders or downloading messages several times) you can use this tool to find and remove them from the selected folder and its subfolder by rightclicking on a folder and choosing "Remove duplicates..."

Addressbooks Synchronizer by Guenter Gersdorf

Rated 4 out of 5 stars 57 reviews

31,730 users

Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers

ThunderBirthDay by ingomueller.net

Rated 4 out of 5 stars 79 reviews

20,404 users

Display birthdays from the Thunderbird addressbooks as events in Lightning.

MagicSLR by Alexander Ihrig

Rated 4 out of 5 stars 40 reviews

11,445 users

MagicSLR extends functions and buttons to get and send messages. Many users missed a combined "Get/Send" button in Thunderbird. MagicSLR provides this button and more.

Update Notifier by Todd Long

Rated 5 out of 5 stars 179 reviews

11,986 users

Note from Mozilla: This add-on has been discontinued. Try Add-on Update Checker instead.

Notifies you when updates are available for your extensions and themes.

Attachment Sizes by Frank DiLecce

Rated 4 out of 5 stars 56 reviews

2,562 users

Ability to see attachment sizes ...

Delete Junk Context Menu by chuonthis

Rated 4 out of 5 stars 8 reviews

774 users

Adds 'Delete Mail Marked as Junk' to folders' right click...

Unselect Message by Michael Buschbeck

Rated 4 out of 5 stars 30 reviews

238 users

Prevents Thunderbird from selecting the next message after you've deleted or moved the previously selected ones. Stay in control of which message you want to have selected and displayed in the preview pane; that piece of spam you're deleting...

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