Add-ons
My Favorite Add-ons
by Nikolay
About this Collection
Automation, privacy and control. For advanced users. "Must have" third party add-ons: "HTTPS Everywhere" and "uBlock Origin".
14 Add-ons in this Collection
DKIM Verifier
Remove Duplicate Messages
by Eyal Rozenberg
102,890 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
59,074 users
Switch the signature on/off or choose a new one from your predefined set.
quickFilters
by Realraven (Axel Grude)
13,034 users
Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.
By popular demand, supports SORTING filters alphabetically.
Automatic Dictionary
by beltrachi
3,860 users
Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.
FiltaQuilla
by R Kent James, Realraven (Axel Grude)
16,534 users
Adds many new mail filter actions - launch a file, suppress notification, remove star or tag, mark replied or unread, copy as "read", append text to subject.
Disable DragAndDrop (Thunderbird)
by Takayama Fumihiko
66 users
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.
Toggle Quotes (Collapse Quotes)
by Dillinger
173 users
Adds a Toggle Quotes button, allows to collapse quotes.
Auto Address Cleaner
by Toshi, John Bieling
10,169 users
Remove comment, display name from addresses before sending mail.
Compact Headers
Display Mail User Agent T
by Toshi
12,183 users
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.
Larger Message List
by Roy Prins
48 users
Thunderbird 78+ extension that improves the readability of the message/thread list by using a slightly larger fonts and wider spacing in the folder tree view.
Toggle HTML
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