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

WARNING: the last version is only compatible with Thunderbird 78.5+

This is a full theme for the Thunderbird e-mail client, inspired by Monterail mockup and by spymastermatt's dark theme. As opposed to the spymastermatt's version, this theme can be installed easily and quickly with an addon and it's compatible with Thunderbird 78.

The first step is to download the latest release of the theme XPI. On Thunderbird go to Add-ons > Settings > Install Add-on from file. Choose the XPI you just downloaded.

The theme can be directly downloaded from the Thunderbird Add-on market, the old version can be found by searching "Monterail Dark 2.0 for TB>68" directly in the add-on page of thunderbird or there.

• The original Monterail version will be released?

Nope, it already exists: Monterail by Paenglab.

• This theme works with Windows/Linux/MacOS?

Yes. Currently the theme has been tested only on Windows 10 and openSUSE. You are free to open an issue here on GitHub if you find bugs.

• With which versions of Thunderbird can I use this theme?

Version 1.0.5 works with Thunderbird >=78.5.0.

This addon is based on Monterail by Paenglab, source code is included.

Special thanks to spymastermatt for the work that he done to create the original dark theme. Also to conema for the sheer help on adapting the theme to the newest versions of Thunderbird (78+).