Avaliado em 5 de 5 estrelas

If you want a fully dark theme for Thunderbird, this is the one. With this last update, Full Dark is truly fully dark, including the search tabs and the Today Pane. It also has none of the niggles that plague the initial Monterail theme.
These themes should be installed by default with Thunderbird. They're that good.

If I could I would give this a 6 out of 5 stars.

The Monterail Dark and Full Dark themes look great. It's great that now there is an easy way to install the Monterail themes and that they work better with the Write pop-up.

These themes are essential to make Thunderbird look like an e-mail client for 2018 (also adopting a vertical view helps with that).

The developer is very responsive, polite and fast in addressing issues. He quickly resolved conflicts that did not allow to have multiple Monterail themes installed!

With 1.1.2 he polished the tab bar with maximized windows AND made the Calendar and Tasks sidebar adopt the dark color of the theme. And they look gorgeous!!

Esta análise é para uma versão anterior da extensão (1.1.3). 

Avaliado em 5 de 5 estrelas

The Monterail Dark and Full Dark themes look great. It's great that now there is an easy way to install the Monterail themes and that they work better with the Write pop-up window than css themes that were previously available.

These themes are essential to make Thunderbird look like an e-mail client for 2018 (also adopting a vertical view helps with that)

The developer is very responsive, polite and fast in addressing issues. He quickly resolved conflicts that did not allow to have multiple Monterail themes installed!

With 1.2 he also polished the tab bar with maximized windows AND made the Calendar and Tasks sidebar adopt the dark color of the theme. And they look gorgeous!!

Esta análise é para uma versão anterior da extensão (1.1). 

Avaliado em 4 de 5 estrelas

The Monterail Dark and Full Dark themes look great. It's great that now there is an easy way to install the Monterail themes and that they work better with the Write Window.

The developer resolved the conflicts with the other Monterail themes. Now you can have multiple Monterail themes installed!

Just reinstall the theme following the steps mentioned by the dev.

Also, when the thunderbird window is maximized in Windows 10, the tab/minimize/maximize/close titlebar is cropped (noticeable when hovering the mouse over them).

Also, the Calendar sidebar does not assume the theme colors.

Esta análise é para uma versão anterior da extensão (1.0.3). 

All these issues are resolved with version 1.1!

Avaliado em 3 de 5 estrelas

It conflicts with the other Monterail themes. Can only have one Monterail theme installed at a time.

Also, when the thunderbird window is maximized in Windows 10, the tab/minimize/maximize/close titlebar is cropped.

It also conflicts with Monterail theme from Paenglab. I have to follow the steps mentioned in the instalation whenever I want to change the theme, and that's a hassle. Please fix this so that I can have multiple Monterail themes installed.

Esta análise é para uma versão anterior da extensão (1.0.1). 

A fix for compatibility issues between versions is being released, it will be out in a few hours, after it has been accepted by admin. Note that the new version of Thunderbird has a bug that compromises the normal working of themes, themes aren't applied, it can't be fixed by themes developers. This fix only resolved the bug that did not allow to activate one theme a the time, because everyone is activated together.

I can't reproduce your second problem, about the titlebar being cropped. I would be glad if the discussion continued in the support website linked on the right (https://github.com/conema/monterail-fulldark/issues), so we can discuss your problem better.