Appearance and Customization


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
1 user
Updated March 15, 2018

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)
257 users
Updated March 13, 2018

Lightning Colors Reminder Requires Restart

Let's show the calendar color on Lightning reminders!

Rated 4 out of 5 stars (3)
5,664 users
Updated Feb. 27, 2018

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 5 out of 5 stars (4)
7,819 users
Updated Feb. 19, 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
7 users
Updated Feb. 15, 2018

Switch Link External Handler Requires Restart

Provides abilities to switch external handlers to open links.

Not yet rated
5 users
Updated Feb. 15, 2018

Force Hide Message Pane Requires Restart

Force hide message pane at startup.

Not yet rated
10 users
Updated Jan. 24, 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 4 out of 5 stars (42)
14,171 users
Updated Jan. 15, 2018


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 Fx52-61+

Rated 5 out of 5 stars (6)
1,260 users
Updated Jan. 9, 2018

Search Results Sort By Date Not Relevance Requires Restart

Makes search results sort by "date" instead of "relevance" by default.

Rated 5 out of 5 stars (15)
3,155 users
Updated Dec. 29, 2017

Enhanced Priority Display Requires Restart

Enhanced thread pane display of message priorities.

Rated 5 out of 5 stars (7)
1,178 users
Updated Dec. 26, 2017


Adds icons to buttons and/or menus.

Rated 4 out of 5 stars (94)
4,637 users
Updated Dec. 9, 2017

Disable DragAndDrop (Thunderbird) Requires Restart

A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.

Rated 5 out of 5 stars (16)
2,126 users
Updated Dec. 8, 2017

Menu Filter

Keep your menus in check by filtering out items you never use.

This extension is not being converted to a WebExtension.

Rated 4 out of 5 stars (50)
3,489 users
Updated Dec. 4, 2017

Signature Switch Requires Restart

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

Rated 4 out of 5 stars (191)
71,236 users
Updated Dec. 4, 2017

Menu On Top (SuperMenu Avatar)

Move the Thunderbird menu bar to the top. Choose from a selection of visual styles + colors. Add frequently used bookmarks and an avatar icon without wasting precious screen space. Bookmark your favorite sites, emails, folders or configuration pages.

Rated 5 out of 5 stars (7)
1,256 users
Updated Nov. 26, 2017

Get/Send-Button Requires Restart

A combined Get/Send-Button and a popup menu with additional functions.

You may want to use it together with the following Add-ons:
* Send Later Button (by me / Alexander Ihrig)
* Send Later (by jikamens)

Rated 4 out of 5 stars (47)
9,153 users
Updated Nov. 23, 2017

Lightning Calendar Tabs Requires Restart

Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.

Rated 4 out of 5 stars (10)
26,263 users
Updated Nov. 22, 2017

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)
369 users
Updated Oct. 26, 2017

NoiaButtons [Fx45-56][Tb45-58]

The 'NoiaButtons' add-on offers cartoonish toolbar button icons (known from Noia themes) for default theme and lightweight themes. Further more lite silver and dark versions of Noia themes are included.

Rated 5 out of 5 stars (21)
11,710 users
Updated Sept. 13, 2017