Thunderbird

by Arno Nym

12 Add-ons in this Collection

German Dictionary by KaiRo

Rated 4 out of 5 stars 83 reviews

266,908 users

German Dictionary (new Orthography) for spellchecking in Mozilla products

Remove Duplicate Messages by Eyal Rozenberg

Rated 4 out of 5 stars 303 reviews

98,968 users

Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).

Signature Switch by Achim Seufert

Rated 4 out of 5 stars 276 reviews

56,453 users

Switch the signature on/off or choose a new one from your predefined set.

Addressbooks Synchronizer by Günter Gersdorf

Rated 4 out of 5 stars 82 reviews

27,015 users

Synchronizes selected addressbooks with other instances of thunderbird
using local files, webdav servers or imap servers

Custom Buttons by Yan, cubegm, others

Rated 4 out of 5 stars 125 reviews

20 users

Gives a possibility to create custom toolbarbuttons...

Nostalgy by Alain Frisch

Rated 5 out of 5 stars 227 reviews

965 users

Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion.

Folderpane Tools by chuonthis, Philip Chee

Rated 3 out of 5 stars 125 reviews

198 users

Allows for customization of the folder pane. Accounts can be rearranged and the startup folder can be chosen.

Mnenhy by Karsten "Mnyromyr" Düsterloh

Rated 4 out of 5 stars 39 reviews

26 users

The primary goal of the Mnenhy project is to make some enhancements to SeaMonkey MailNews/Thunderbird, since there're still plenty of comfort functions missing if compared to Netscape 4.x and other mail and news clients.

CuteMenus - Crystal SVG by mrtech, Static_Nexus, others

Rated 4 out of 5 stars 102 reviews

0 users

Note from Mozilla: This add-on has been discontinued. Try Menu Icons Plus instead.

Adds icons to all menus along with some other features...

Buttons! by chuonthis

Rated 4 out of 5 stars 61 reviews

1 user

Adds buttons to the Thunderbird toolbars such as Next! and Previous! buttons for navigating through all messages instead of just unread ones. See homepage for more...

Attachment Sizes by Frank DiLecce

Rated 4 out of 5 stars 57 reviews

1 user

Ability to see attachment sizes ...

Custom Buttons² by SCClockDr, nicholasalipaz, others

Rated 4 out of 5 stars 75 reviews

1 user

The Custom Buttons² Firefox extension provides the code base support necessary to create, maintain, import, and export custom toolbar buttons. The buttons can perform just about any task, with a large number of buttons already available on the exte...

What are Collections?

Collections are groups of related add-ons that anyone can create and share.

Explore Collections