Android-add-ons

Parasol Totoro door potatoes

Totoro from Studio Ghibli

Seagulls Watching door Tracee

Reece's Mixed Dark door Reece

Dark theme with blue accents.

Breeze Solarized Light door rplasson

Simple theme based on Kde Breeze Light theme, with solarized colors.

n(d).white.fresh door Carlos Alberto Rojas De La Torre

A white fresh theme by neuro(drive).pro()

Nu-grey-theme door cybrkyd

A simple grey theme for Thunderbird. A solid colour hex #ccc background which may help reduce eye-strain.

MMB TB Light-Gray-Green door hbckrmzila25

Light-gray table-view with green buttons and blue menues.
Rounded buttons and toolbars.
Thunderbird image in upper right corner.
Rel. 2.179: Calendar + Spell-check dialog + Task actions toolbar adjusted.
Rel. 2.197: - for rel. 152.*.

Cookie Monster door satasuke

i love Cookie Monster

Ice Age door Gambat

House Stark - Game of Thrones door ladynany

Estandarte del lobo huargo, de la Casa Stark en la saga y serie de HBO Game of thrones.

Hatsune Miku - Yuki II - Animated door BXPCFox

Hatsune Miku - Yuki II - Animated - Music - Vocaloid - Anime

One Piece - Luffy and Sunny door DamianWayne

One Piece by Eiichiiro Oda
Image by Feriowind @ Pixiv (http://www.pixiv.net/member.php?id=725334)

Little Mermaid Ariel door Neviathien

The Little Mermaid
Disney

The Penguins of Madagascar door albyx87

The Penguins of Madagascar

Mac OS X El Capitan door Rich Garbutt

A Mac OS X El Capitan colour scheme for firefox