- Thunderbird themes and skins

Thunderbird - Chris' CLEAN ADAPTION no1

A very cleaned-up style for the User Interface only. Inspired by Material design, Outlook and Postbox. Affects the main-interface and the calendar/lightning add-on. Detailed description and comments inside the CSS. Please read the additional information here, or the one inside the code. Updated (1) 15.Dec.2015 - force white titlebar also with cuxtom visual styles.

Updated: Dec 15, 2015 Installs This Week: 18 Average Rating: Good
Numix Dark - Fix for Thunderbird

For people who use the awesome Numix Dark theme for Linux. This userstyle fixes Thunderbird's horrible appearance if you use Numix Dark. If you want to know what parts of Thunderbird are changed: Screenshots speak louder than words, so check them out.

Updated: Feb 16, 2014 Installs This Week: 20 Average Rating: N/A
Thunderbird Dark

Dark theme for Thunderbirds main UI. If you have any issues with this style, please open a ticket at

Updated: Oct 12, 2015 Installs This Week: 18 Average Rating: OK
Dark Thunderbird Conversation

A dark view of thnderbird conversation, for use with a dark theme On the screenshot, I also use accountColor

Updated: Nov 18, 2014 Installs This Week: 10 Average Rating: N/A
Thunderbird for Windows 10

Some Opera-inspired adjustments of a particular "square tab" theme to fit with Windows 10 better.

Updated: Jul 31, 2015 Installs This Week: 9 Average Rating: N/A
Thunderbird for Windows 8\10

Gets Thunderbird more fit with Windows 8 and Windows 10 looks - sharper tabs, fewer gradients. Customizable.

Updated: Jan 16, 2016 Installs This Week: 9 Average Rating: N/A
GTK Native for Thunderbird (disable Australis)

Makes Thunderbird conform to the system theme for the tab bar and tool bars, removing Australis look. Tabs are taken from Thunderbird 5+ GTK Tabs, which also has an option for native toolbars but it doesn't work well with recent Thunderbird.

Updated: Mar 11, 2016 Installs This Week: 6 Average Rating: N/A
Numix Tabs for Thunderbird 15+

A tab style for Thunderbird based on the Numix GTK Theme ( and on Numix for Firefox. Changes tab toolbar and tab appearance.

Updated: Aug 11, 2015 Installs This Week: 5 Average Rating: N/A
Thunderbird Lightning Dark

A remix of Thunderbird Darkning by BastienHo.

Updated: Apr 8, 2015 Installs This Week: 4 Average Rating: N/A