Android Add-ons

Parasol Totoro by potatoes

Totoro from Studio Ghibli

Seagulls Watching by Tracee

Reece's Mixed Dark by Reece

Dark theme with blue accents.

Breeze Solarized Light by rplasson

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

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

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

Nu-grey-theme by cybrkyd

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

MMB TB Light-Gray-Green by 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 by satasuke

i love Cookie Monster

Ice Age by Gambat

House Stark - Game of Thrones by ladynany

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

Hatsune Miku - Yuki II - Animated by BXPCFox

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

One Piece - Luffy and Sunny by DamianWayne

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

Little Mermaid Ariel by Neviathien

The Little Mermaid
Disney

The Penguins of Madagascar by albyx87

The Penguins of Madagascar

Mac OS X El Capitan by Rich Garbutt

A Mac OS X El Capitan colour scheme for firefox