Cobalt2

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

Muted Sage Gruvbox Dark

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

Dark15_Th

Dark Theme CR style Win11 for New Thunderbird 15.

Rose Pine Dawn

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

ULTRAWIDE ANIMATED MATRIX

Extended Version for Ultrawide Monitors

Valorant Red

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

Dark electric violet

Dark and violet theme for Thunderbird by Stonymontana

Dark Wood Bird

Un thème bois sombre avec logo Thunderbird

Abstract Theme Carole Pepper

An abstract Firefox theme of the charactor Carole Pepper of Honkai Impact 3rd. Inspired by the color of the character's default skin, including the character's skin tone and clothing color. The copyright owner of the charactor Carole is Mihoyo.

Goupilmtos-2024

thèmes Goupilmt OS 2024 for thunderbird.

3DTriangles

A Mozilla Thunderbird theme with 3D Objets and transparent design

Dark Shadows XT

Dark Shadows XT theme for Thunderbird by Nyquisteroux. Quite dark theme, based on shades of grey colors and optimized for enlarged Thunderbird interface - to see best results, set Density: Relaxed and Font Size: 15px in Thunderbird Options.

Endeavour_Purple

My Theme

Japanese Tattoo 精选

Colors and accent adjusted

Airmail 精选

Dark Night Arcturus X

Quite dark theme, based on shades of grey colors with blue and orange elements. Optimized for enlarged Thunderbird interface - to see best results, set Density: Relaxed and Font Size: 15px in Thunderbird Options.
Thank you.

Blur (violet, orange, green) 精选

Blur, violet, orange, green.