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.

Needs previews or guides for the advanced part

I really like being able to customize my own theme, however it is a major drawback not being able to view my created themes without saving a new one. There should just be a tab for all the themes I have already created. Additionally, I'd really like to be able to change the background color of the sidebar and context menu, and the ability to pick colors from an imported image would be nice.

Does a good job from first installation a long time ago, but CAN"T figure out how to restart the %^&#%#$@ editing process !!!!! WHERE is a user instruction ?!?

The browser starts with the default theme, and it takes a while to reload the correct theme created by color.firefox.com

Good Tool. Would have rated it higher but,
1. Exported themes won't install, they have to be signed by mozilla (a long winded process) and
2. The page layout for the popup menu box example, hides the saved themes option, making it impossible to select/change themes without zooming the page right down.

That said, exported and signed theme did install and work well. not really for novices.

If devs can fix these issues, its a excellent tool.

A recent update caused my custom there to start forcing dark/night mode on websites. This doesn't happen on some default themes, but on my custom one I can't find an option to return to a light theme. I liked it a lot before this update.

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