abstract nine

3DTriangles

A Mozilla Thunderbird theme with 3D Objets and transparent design

Abstract Space Blue

Space
Espaço Sideral
Galaxy
Galaxia

Sparkle Stuff by MaDonna

Theme Designed by MaD♥nna

Valorant Red

A Thunderbird theme version with custom 'Valorant'-red CSS

Dark15_Th

Dark Theme CR style Win11 for New Thunderbird 15.

Splat Theme

Purple Pinkish Theme.

Windows 10 Style

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.

Liquid Gold WebExtension theme

Liquid Gold Theme for Thunderbird. I made it just for my own use. Hope you like it too..

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.

Verdurous Darker

A dark, forest theme.

HEKISU1

HEKISU1, BY: HEKISU1, Thamyris, Thamyris71.

Clean and Professional

Clean and polished theme for Thunderbird and Firefox.

Solarized light Theme ternoc

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

Muted Sage Gruvbox Dark

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

Rose Pine Dawn

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

ULTRAWIDE ANIMATED MATRIX

Extended Version for Ultrawide Monitors

Dark electric violet

Dark and violet theme for Thunderbird by Stonymontana

Endeavour_Purple

My Theme