Appearance and Customization


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 5 out of 5 stars (1)
108 users
Added August 26, 2016

Layout Button Requires Restart

A toolbar button to switch between layouts.

Rated 5 out of 5 stars (1)
138 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.

Not yet rated
361 users
Added June 25, 2016

Tategaki Requires Restart

Tategaki allows vertical writing-mode on mail compose window.

Not yet rated
22 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
182 users
Added May 15, 2016

Website to PDF Requires Restart

Convert the current webpage into a PDF file!

Just for now - get also a PRO version for FREE!

Rated 1 out of 5 stars (3)
4,072 users
Added May 10, 2016

Send Later Button Requires Restart

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

Not yet rated
2,741 users
Added April 28, 2016

ansitel Click-to-Dial Thunderbird Requires Restart

Click-to-Dial Plugin für ansitel VoIP-Telefonanlagen zum Markieren und Wählen von Rufnummern in Mozilla Thunderbird.

Not yet rated
14 users
Added April 27, 2016

Lowercase Email Addresses in Message Headers Requires Restart

Shows lowercase email addresses in message headers and their tooltips.

Rated 1 out of 5 stars (1)
116 users
Added March 28, 2016

Responsible Blocker

The "Responsible Blocker" arrives to save the Internet, this extension blocks all those annoying ads, but allows only small and acceptable ads, so the websites you like can continue online.

The "Responsible Blocker" arrives to save the Internet!

Not yet rated
18 users
Added March 9, 2016

Sender Frequency Requires Restart

Adds a custom column for Sender Frequency to the thread pane

Rated 4 out of 5 stars (3)
76 users
Added March 7, 2016

Classic Pop-up Alerts

This addon returns the old view of the pop-up notifications, as in Firefox 4.0 - 43.0

Not yet rated
603 users
Added February 20, 2016


Add-on for Firefox and Thunderbird. Replaces built-in notifications with the OS native notifications. It supports most Linux Desktop Environments, Windows 8.1 & 10.

Rated 5 out of 5 stars (16)
13,201 users
Added February 14, 2016

Email Addresses in Message Headers Requires Restart

Shows email addresses in message headers, including those of contacts, and provides control over message header presentation.

Rated 3 out of 5 stars (2)
308 users
Added February 13, 2016

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (3)
698 users
Added January 12, 2016

No need flash plugin on embeded youtube movies

No need flash plugin on embeded youtube movies

Rated 4 out of 5 stars (2)
6,678 users
Added January 1, 2016

Hide Badge Icon Requires Restart

Hides the badge for new messages of the Thunderbird app icon on Mac OSX.

Not yet rated
9 users
Added November 8, 2015

Thunderbird-DontRestoreTabs Requires Restart

Allows the user not to restore tabs at startup in Thundertbird

Not yet rated
78 users
Added October 18, 2015

Contact DnD Requires Restart

Enables one to assign a photo to a contact by dragging and dropping it from the local filesystem.

Not yet rated
15 users
Added October 6, 2015

Pic Zoom Requires Restart

Zoom in and out of any image on a page

Not yet rated
143 users
Added October 1, 2015