Newest Extensions


Dark Gold

A dark black and gray theme with gold/orange accents. A port of my Dark Gold theme for Firefox, with some tweaks specifically for Thunderbird.

Not yet rated
2 users
Added Sept. 20, 2022

Windows 11 Dark

The grey color from Windows 11 Dark (#202020)

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

Not yet rated
29 users
Added Aug. 15, 2022

Tokyo Night

A nice dark theme for Thunderbird based on Enkia's Tokyo Night theme for VIsual Studio Code.

Not yet rated
31 users
Added July 12, 2022

Dark/Black theme

A simple black and white dark theme based on Luminous Matter.

Not yet rated
46 users
Added July 11, 2022

Clean and Professional

Clean and polished theme for Thunderbird and Firefox.

Not yet rated
39 users
Added July 4, 2022

Misas México Tema

Tema para thunderbird de Misas en México

Not yet rated
10 users
Added June 30, 2022

Neat Dark Theme - Pink

A Pink Neat Dark Theme for Thunderbird

Not yet rated
17 users
Added May 20, 2022

Neat Dark Theme - Blue

A Blue Neat Dark Theme for Thunderbird

Not yet rated
80 users
Added May 20, 2022


Grey and orange theme

Not yet rated
4 users
Added May 10, 2022

Seoul Dark

Seoul dark theme for Thunderbird. Adapted from calvinchd's Gruvbox Dark (, inspired by junegunn's color scheme for vim (

Not yet rated
22 users
Added May 9, 2022


A personal mix between dark and light modes.

Rated 5 out of 5 stars (1)
47 users
Added May 3, 2022

Tiger eyes turquoise (dark theme)

A dark theme of a gray toned tiger with turquoise eyes.

At least Thunderbird 102 is required to control the browser theme.

This is a modified version of the theme "tiger eyes light blue" from AmSumz.

Not yet rated
33 users
Added March 19, 2022


HEKISU1, BY: HEKISU1, Thamyris, Thamyris71.

Not yet rated
3 users
Added March 3, 2022

Dark Imagine Theme

Simple black theme by Imagine.

Not yet rated
13 users
Added Jan. 29, 2022



Black + Charcoal Foundation With Deep Crimson Accents.

Rated 5 out of 5 stars (2)
81 users
Added Jan. 16, 2022

Green over solid black

A simple green over black solid theme. Based on Luminous Matter theme.

Not yet rated
32 users
Added Jan. 3, 2022

Nord Theme

An adaptation of the Nord Theme for Thunderbird.

Not yet rated
103 users
Added Nov. 25, 2021

Tristana Theme (League of Legends)


Rated 5 out of 5 stars (1)
10 users
Added Nov. 22, 2021

Autumn Wheat Theme

A warm theme perfect for fall with wheat and complementary orange-yellow-brown colour scheme.

Not yet rated
38 users
Added Oct. 9, 2021

One Dark

One Dark theme for Thunderbird.

Rated 5 out of 5 stars (1)
155 users
Added Oct. 9, 2021