- 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: 30 Average Rating: Good
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: 19 Average Rating: OK
Thunderbird - Shades of Gray

Really wanted a clean dark theme, but no good ones that I liked existed. Created this and realized how easy (and a bit of a pain) it was to make one. This includes a slightly modified Twister's Labels. Hope you enjoy!

Updated: Sep 15, 2015 Installs This Week: 13 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: 11 Average Rating: N/A
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: 10 Average Rating: N/A
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: 8 Average Rating: N/A
Thunderbird FlatStudio Tabs (like tabs-2.css)

This style makes Thunderbird tabs look like those in the FlatStudio GTK+ theme (without the rounded corner, as when tabs-2.css is selected in gtk.css). This is a direct port of my Firefox FlatStudio Tabs style.

Updated: May 23, 2015 Installs This Week: 7 Average Rating: N/A
Thunderbird theme for Ambiance Dark Blue theme

Thunderbird Dark Blue theme This theme has been created for Ambiance Dark Blue theme from created and tested on Thunderbird version 31.0. In new version add custom color for treechildren

Updated: Jun 20, 2015 Installs This Week: 6 Average Rating: N/A