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To must occur only once

This add-on changes all but the first "to" to "cc" if there are multiple "to" when replying to an email.

Rated 5 out of 5 stars (1)
23 users

TuLPe

Traffic light protocol extension for Thunderbird, messages are customizable in the option page.

Not yet rated
16 users

Transfer Immunity

Transfer Immunity is a fast and secure add-on and SaaS service for sharing and transferring files. This high-fidelity, SaaS-based platform allows users to send large files to different destinations as attachments with emails.

Not yet rated
17 users

smartCompose

A smart Plugin which provides functionalities to compose emails.

Not yet rated
6 users

CloneMessage

When composing an email, CloneMessage allows you to duplicate the current state of the email.

Rated 5 out of 5 stars (1)
143 users

Minimize on startup

Minimize thunderbird window on startup!

Rated 4 out of 5 stars (7)
4,005 users

Hawk for Thunderbird

Hawk for Thunderbird is an AI-powered plugin designed to generate clear and personalized emails, translate content, fix grammar errors, and streamline your email communication workflow.

Rated 5 out of 5 stars (2)
7 users

PopMailListRecipients 2

Expands address book lists to recipients addresses in the compose window

Rated 4 out of 5 stars (5)
210 users

Open Google Calendar

Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)

Rated 4 out of 5 stars (77)
20,951 users

stripImages

Remove all images from message with one click.
Places a "strip images" button on the toolbar of the message compose window.
Clicking the button will remove all images from the message.
This helps keep mailbox disk space down.

Rated 4 out of 5 stars (11)
215 users

Google Calendar Tab

Adds a button to open Google Calendar in a new Tab

Rated 4 out of 5 stars (17)
7,654 users

Beeper Thunderbird Add-on

A simple add-on with a button in the Spaces toolbar.

I created this by reverse engineering one of the many good add-ons in the Mozilla store and replaced the URL with chat.beeper.com and a logo.

Requires an account with beeper.com

Not yet rated
8 users

Netiquette Checker

An integrated netiquette checker for EPITA students.

List all the netiquette rules that are not respected when writing an email.

Feel free to contirbute to the repository:
- https://github.com/d4ilyrun/netiquette

Not yet rated
3 users

Thunvatar

Adding a column with the favicon of sender's domain to the message list

Rated 5 out of 5 stars (12)
7 users

GCalTab

GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.

Rated 5 out of 5 stars (12)
1,759 users

quicker quicksearch

make searching for emails faster:

Automatically insert into the quickfilter box: the author, subject or the email domain of the selected email.


No need to retype the address, if you want to search for all emails of this author.

Rated 5 out of 5 stars (7)
1,118 users

TileNote

Tile notes, I provide this web app. to Mozilla Thunderbird users.
This is a derivative of RainbowNote, 7 colorful week notes, with tile like shapes.

Not yet rated
47 users

vault56 protection

vault56 protection protects against potentially malicious attached files and links. Links are rewritten to pass through vault56 URL protection servers and checked for trackers and malicious activity.

Rated 5 out of 5 stars (2)
49 users

archive-by-time

With the filter function comes with thunderbird, all emails met rules will be moved to a specific folder. As time passed the folder would grew bigger and I wanted to put all emails into sub folders classified by year.

Not yet rated
208 users

Click Speed Tester

Test your click speed and practice different clicking techniques.

Not yet rated
4 users