Dark15_Th

Dark Theme CR style Win11 for New Thunderbird 15.

Solarized light Theme ternoc

Solarized theme created by ternoc, based on Ethan Schoonover palette.

HEKISU1

HEKISU1, BY: HEKISU1, Thamyris, Thamyris71.

Goupilmtos-2024

thèmes Goupilmt OS 2024 for thunderbird.

Game Red Highlighted

A thorough red/dark gaming theme, no distractions, strong red details and a red indicated current tab to never be confused and always remain focused.

Windows 10 Style

Dark electric violet

Dark and violet theme for Thunderbird by Stonymontana

Rose Pine Dawn

A theme based on the Rose Pine Dawn color scheme (https://rosepinetheme.com/)

Cobalt2

A faithful port of the original Cobalt2 theme by Wes Bos.

Clean and Professional

Clean and polished theme for Thunderbird and Firefox.

Verdurous Darker

A dark, forest theme.

ULTRAWIDE ANIMATED MATRIX

Extended Version for Ultrawide Monitors

Owner Gold

This Add-on is a simple theme.
Which is a set header on thunderbird or firfox also.
Header image is based on galaxy image as show on header.

Muted Sage Gruvbox Dark

Muted Sage Gruvbox dark theme for Thunderbird.
Forked from calvinchd's gruvbox dark theme.