Rated 5 out of 5 stars

Thanks a lot for the theme, it is the perfect dark theme I was looking for, kudos to the Dev team !!!

I would like to suggest two features, while everything is dark in most of Mail, Chat, Calendar tabs, Preferences, etc, the two places where I see a huge white patch is the 'Chat' tab
(current conversation area in the middle) and Mail tab(the mail body area)

These are areas are completely White, and is in stark contrast to the theme's nature.

If you could, please take a look, Thanks again !

Léirmheas ar leagan níos sine den bhreiseán seo (12.0.4). 

Thank you for your nice feedback about my work. I'm glad that you appreciate TT DeepDark add-on.

Concerning your suggestions:

1) 'Chat' tab appearance:
I don't manage to customize the 'Chat' tab appearance through my theme. Honestly, I don't know if it is even technically possible to do it with complete themes;

2) 'Mail' tab:
If you mean the email background/text for received email, as stated in the add-on description, you can customize this via the Thunderbird default settings. That's why I even didn't consider to touch that area. Each user can choose the color he/she wants. The same for the 'mail compositor' window.

By the way, I'm handling everything alone when I have available free time for it (there is no team). That's why it can take some time before I update/fix the theme. That's also why I do not offer color variations of my theme (I don't have the time to handle multiple themes neither to create a 'companion add-on' which could allow users to customize themselves the colors and/or the layout).