There are some problems:

- It can't change context menu color.
- Exported themes can't be installed, Firefox says it is broken.

Nealry 5 stars BUT -2,5 for no IMPORT !!!
REALLY ?

Guys, you make an export Button but no import from local HD ???

Sadistical !

This add-om longer works as of newest versions of Firefox. I hope it will soon be updated so that it can work again since I have used this add-on for years without any issues. Since the last update it no longer functions until manually enabled, some parts still don't function after manually enabling. Dependencies and deprecations are likely to blame.

Used to work great; in Firefox 132 it often doesn't work when the browser starts and backgrounds all revert to white. Worked great in at least Firefox 109 and earlier. It also no longer affects top menu bar menu backgrounds and right-click menu backgrounds. This is one of the reasons I don't normally update the browser... because it breaks extensions and it's a nightmare and takes hours of time to try to troubleshoot, often with no resolution. Very frustrating.

creating a theme is easy; HOWEVER, trying to select a saved theme is literally impossible because of the popup preview. The popup preview literally covers the saved theme tab, and the only way to access it is by saving another theme. it's got some jank, and i wish you could edit or crop and reposition your photos, but it's fairly easy to use.

I just don't like pink - but it's default everywhere

this is okay

I really just want to be able to pick from a pallet of colors across the color spectrum similar to chrome!

I really like this feature, but there is one thing I would like it to have: the capability to choose to make the toolbar, tabs and address bar transparent. On my screen when I add a custom background image I only see about a half-inch of it because the toolbar, search/address bar and tabs have to be a color which covers up most of the image. I would like to be able to make them all transparent as people do with custom themes, or better yet to adjust the percentage of transparency when choosing a color to make it even more customizable.

its super unnecessarily complicated to get themes you make to show up in the regular theme manager, but its a pretty good tool otherwise

It's a cool addon, but it doesn't change color in night mode.

i might be misunderstanding the point, but I like having the option to switch between multiple themes very often. you can't do this here because it deletes themes an hour after you save them
still pretty good

Interesting add-on but it overrides my default dark background. I don't understand why an add-ond is needed to change some colors. These changes should be in native Firefox parameters.