Cool Blue

Just a plain cool theme

Black Solid

black

Stylish

Gray gradient stylish theme

Galizur Theme

A spellbound, vibrant dark thunderbird theme

glowing black

black with glowing letter

Mac OSX Light

It's for those Mac OSX users that want just a slightly lighter interface. Enjoy!

Gaming Red & Black

Greenish Blue

macOS Sierra Dark Theme

A Solid black theme to match macOS Sierra's new Dark Theme. Also works well with Mac OS X Yosemite's Dark Theme.

MaDonnas Aurora Blue

Designed by MaDonna

Windows 11 Dark

The grey color from Windows 11 Dark (#202020)

It goes very well with BIB3 by Niivu (Windows 10/11 Theme).

black Brushed

Rated me

n(d).dark.fresh

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

Classic Red

My first persona. A beautiful dark red gradient that will surely be a mainstay on your firefox main GUI.

Dark Development Theme

Dark Blue Theme specially maid not to disturb eyes.

Minimal Flat Grey

Glass - Blood

Simple clean glass effect with color accents.

Hot Pink Atmosphere

hot pink blue gray

Neat Dark Theme - Blue

A Blue Neat Dark Theme for Thunderbird

White Glossy Look

White Glossy Look