Hello,
The global setting are in the Options page / Dials tab or Groups tab.
And there is also third way for skilled users - using custom CSS styles on the General tab / "Custom CSS styles:". That way you can change any visual aspect of your dials page.
I will be adding ability to create and share your own theme with others so that there is more visual options available.
Also please contact me to my support e-mail regarding the other things.

Best regards,
Juraj Mäsiar

EDIT: I've just released new version 12.5 that should fix this bug. Thank you again for reporting it :)

Hello,
Thank you for reporting this. I think I know where the issue could be. I will try to fix it today.
If you find more issues, please contact me to my support e-mail.

Best regards,
Juraj Mäsiar

Hello,
This is a Firefox bug, see these:
https://bugzilla.mozilla.org/show_bug.cgi?id=1518863
https://bugzilla.mozilla.org/show_bug.cgi?id=1490260

Right now it affects only some PC. Also note that I've created special option in the Options page / General / "When Firefox starts, open dials page" which should help in most cases.
However the real fix needs to come from Firefox team.


Best regards,
Juraj Mäsiar

Hello,
My add-on is localized to German, there should be no English words. Make sure you have German Firefox installed or install German language pack:
https://addons.mozilla.org/en-US/firefox/addon/deutsch-de-language-pack/?src=search
Please let me know to my support e-mail if it didn't help.
Best regards,
Juraj Mäsiar

Hello,
You can override any CSS style in my add-on. See the Options page / General tab / "Custom CSS styles:".
For example, to change color of dials heading, use this:

.dials > a > div > div {
background: lightblue !important;
}

And to make group list more colorful, use this:

#groups {
background-color: rgba(255, 209, 57, 0.6) !important;
}
#groups > .selected {
background-color: orange !important;
}

You can create also new styles, just inspect the element you want to change and create new CSS rule. However make sure to pick the theme - black or while, depending on whether your final theme will be dark or light.

If you have more questions, feel free to write me to my support e-mail.


Best regards,
Juraj Mäsiar