Glossy Fox

Created this Glossy Design in Photoshop CS4

ASUS - Republic of Gamers V2

Magic winter cat

Magic cat eyes feline

CarbonFox

Carbon Fox

Dark Fox No Logo

Edit of randomaster Dark Fox theme to remove logo.

Mail Delivery 4K (2009 Alt)

Mail Delivery 4K (2009 Alt) theme for Thunderbird 100+ and 4K monitors.

yahane_pattern

yahane_pattern, BY: HEKISU1

Friul

Theme with the official Friulian Flag.

Asus ROG Leather Small Badge

Asus ROG inspired theme with smaller badge to better suit some resolutions

irasutoya01

Thunderbird 78 以降用に使えるテーマを練習用に作ってみました。
Very simple theme, which uses only public domain illustrations.

Breeze (Plasma 5) Arch Linux

Breeze (Plasma 5) + logo of Arch Linux

Mail Delivery 4K (2023)

Mail Delivery 4K (2023) theme for Thunderbird 100+ and 4K monitors.

Thunderbird Daily Suave

Based on the "Thunderbird Suave" theme by aramaicus.

Blue-Fox_by_Valdi

Mail Delivery 4K (Grey)

Mail Delivery 4K (Grey) theme for Thunderbird 100+ and 4K monitors.

Mail Delivery 4K (2004)

Mail Delivery 4K (2004) theme for Thunderbird 100+ and 4K monitors.

Space - wonderful world

space, wonderful world, stars, mathematic

summersmile

Summersmile adds a lively flair to Thunderbird with a sunny yellow background, playful smiley graphics, and a "sunshine and smiles" theme that refreshes your email experience.

New Dark Bird

A Thunderbird theme with the new Thunderbird Logo.

Purple Praline

A purple theme for Thunderbird