Appearance and Customization

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Send to Internals Requires Restart

Provides a special button to send mail to internals. "Internals" may be company, organization, or user group and so on.

Not yet rated
11 users
Added March 5, 2018

Force Hide Message Pane Requires Restart

Force hide message pane at startup.

Not yet rated
16 users
Added Jan. 18, 2018

Switch Link External Handler Requires Restart

Provides abilities to switch external handlers to open links.

Not yet rated
6 users
Added Jan. 18, 2018

No Delete Requires Restart

Prevents to delete messages from your disk. Note that it's OK to move mail into trash folder itself.

Not yet rated
11 users
Added Jan. 18, 2018

Theme Font & Size Changer for ThunderBird

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 3 out of 5 stars (66)
14,877 users
Added Nov. 14, 2017

ansitel Click-to-Dial MT Requires Restart

Dieses Plugin ermöglicht das Wählen von markierten Rufnummern im Mozilla Thunderbird mit ansitel VoIP-Telefonanlagen. Einfach Rufnummer markieren und per Rechtsklick mit der Maus loswählen.

Not yet rated
21 users
Added Sept. 8, 2017

Message Title Header

Show a title header above messages.

Rated 1 out of 5 stars (1)
105 users
Added June 10, 2017

QuickMultiselect Requires Restart

Adds a column with checkboxes so that you can select multiple messages with only a mouse click.

Rated 5 out of 5 stars (1)
140 users
Added May 25, 2017

AddressBook in Tab Requires Restart

Adds a button that can be put in toolbars which opens the addressbook in a new tab like pastismans AddressBookTab

Rated 4 out of 5 stars (5)
7,599 users
Added March 28, 2017

AdvancedTasks Requires Restart

Thunderbirds Lightning Extension: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.

Rated 5 out of 5 stars (2)
374 users
Added March 28, 2017

TipsTrade Ticket Buttons Requires Restart

This extension parses emails for TipsTrade Tickets and VRMs and creates a menu that links directly to the vehicle in the Broking Applications. Add the "Ticket" button to the email preview toolbar. Click on the button to generate tipstrade:// links

Not yet rated
8 users
Added Feb. 20, 2017

Keep in Taskbar Requires Restart

A simple plugin that makes the Close button behave exactly like the Minimize one.

Rated 5 out of 5 stars (5)
3,792 users
Added Feb. 7, 2017

lightningWeather Requires Restart

LightningWeather shows the weather forecast in the background of the calendar so you can easily coordinate your activities with the weather.

Rated 3 out of 5 stars (7)
1,632 users
Added Jan. 15, 2017

CustomizeMyBird

This add-on offers ui tweaks to improve Thunderbirds appearance (squared tabs, custom tab height, alternative Add-on Manager appearance, compact main toolbars and more). v2.0.5+ for Tb52-61+

Rated 5 out of 5 stars (7)
1,265 users
Added Oct. 28, 2016

Checkbox Column Requires Restart

Adds a custom column to Thunderbird's messages list (thread tree), making it easier to select multiple messages on devices with a touchscreen display.

Rated 4 out of 5 stars (6)
380 users
Added Aug. 26, 2016

Layout Button Requires Restart

A toolbar button to switch between layouts.

Rated 4 out of 5 stars (3)
178 users
Added July 9, 2016

Large Fonts Requires Restart

This add-on enables you to change the font size of the plain text editor of Thunderbird.

Rated 3 out of 5 stars (2)
384 users
Added June 25, 2016

Tategaki Requires Restart

Tategaki allows vertical writing-mode on mail compose window.

Not yet rated
33 users
Added May 16, 2016

Highlight Unread Folders Requires Restart

This add-on enables highlighting the account names which contain unread messages.

Not yet rated
227 users
Added May 15, 2016

Send Later Button Requires Restart

A simple button to invoke the (already existing) send later functions.

Rated 5 out of 5 stars (1)
4,592 users
Added April 28, 2016