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TT DeepDark Requires Restart

Simple and smooth dark complete theme for Thunderbird

Rated 5 out of 5 stars (271)
221 users

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Color Transform

Transform the colors of entire web pages or selected elements. Combine predefined themes with basic transforms. Save transforms for specific web domains.

Rated 4 out of 5 stars (25)
4 users

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Metal Lion Sea Monkey Requires Restart

Metal Lion meets SeaMonkey.

Rated 5 out of 5 stars (10)
138 users

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PitchDark for TB Requires Restart

Dark-colored minimalistic theme with emphasis on visibility, usability and maximum screen real estate.

Rated 4 out of 5 stars (52)
0 users

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Colorific

Colorize entire web pages. Configure themes using sliders and drag-and-drop. Set domain preferences for automatic coloration.

Rated 4 out of 5 stars (14)
5 users

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Safe for Amoled

Darkens the background of the page

Rated 3 out of 5 stars (19)
1 user

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glowygreen-thunder Requires Restart

Dark green and gold theme.

Rated 5 out of 5 stars (7)
0 users

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glowywine-thunder Requires Restart

Dark red and gold theme.

Rated 5 out of 5 stars (5)
0 users

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glowyblue-thunder Requires Restart

Dark blue and gold theme.

Rated 4 out of 5 stars (10)
0 users

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Monterail Full Dark 2 for TB>68

Monterail Full Dark, a Thunderbird theme inspired by the mockup of Monterail

Rated 4 out of 5 stars (30)
453 users

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GCalTab

GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.

Rated 5 out of 5 stars (12)
1,832 users

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Monterail Dark 2 for TB>68

Monterail Dark, a Thunderbird theme inspired by the mockup of Monterail

Rated 4 out of 5 stars (15)
197 users

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DeepDark for Thunderbird Requires Restart

Dark mode for Thunderbird UI

Rated 5 out of 5 stars (44)
100 users

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Monterail Dark Requires Restart

Monterail Dark, a Thunderbird theme inspired by the mockup of Monterail

Rated 4 out of 5 stars (15)
5 users

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Darko

Simple dark mode (theme) for your Thunderbird messages.

FastAddons.com/#darko

Rated 5 out of 5 stars (32)
4,916 users

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Monterail Full Dark Requires Restart

Monterail Full Dark, a Thunderbird theme inspired by the mockup of Monterail

Rated 5 out of 5 stars (18)
18 users

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Monterail Darkness Extended

Monterail Dark, a Thunderbird theme inspired by the mockup of Monterail extended to Calendar, Tasks and Composer. Some more tweaks to normalize heights of the tabs and other options.

Rated 5 out of 5 stars (5)
72 users

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Dark Plain Text

Use dark mode styling when reading plain text emails with a dark theme.

Rated 5 out of 5 stars (1)
649 users

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