I don't know what I was expecting. I guess I thought it was going to allow me to not only set a bg image but also be able to see what the image actually is and maybe the entire navigation bar. Images only affect the tabs (windows 10). Uninstalled within 10 minutes.

... This plugin sets the dark mode on websites ...

Found a first solution with the additional installed addon 'automaticDark - Time-Based Theme Changer' of simonkhzhang. In settings of this addon set only 'Change themes based on the system theme' and both! 'Daytime theme: and Nighttime theme:' to light not to dark (german means hell anstelle dunkel). Hope this works for you. Kind regards, Gerald

I uninstalled this great extension, because it shows a white background in the tabs 'Settings', 'Add-ons manager', 'Passwords' and others

This has got the be the best theme available because I get to make my own theme whenever I want, and customize the colors to how my mood fits. Thanks for making this available for us!

I installed the extension because I wanted to add color to the top bar. I made some changes and exited the setup to see the results. But I couldn't find a way to get back to the setup. Finally, I uninstalled it and reinstalled it. But the same thing happened; I couldn't get back to the setup page. So I'm going to uninstall it and hope I can find a way to actually use the extension.

All of a sudden, now this plugin also sets the dark mode on all my websites... Really don't like this ...

This extension provides an easy and quick way to customize the colors in Firefox.

Firefox Colors represents the whole sad history of Firefox and Mozilla. Starting with the best of intentions, and then like a machine rolling through mud, accumulating sludge as it progresses till it is unrecognisable and impossible to use. Gets a good cleanup and starts all over again.
I agree with many of the others, who, like me, are frustrated at this stupid implementation. Every change appears to be irreversible. I have lost all my careful colour setups of versions past. Oh well, there are probably some idiots in a room somewhere patting themselves on the back and thinking they did a great job - so this won't change.
It's okay, we are almost at the point in the Firefox cycle where I drop off and walk with relief towards Chrome...

класс!!!