Confusing just at a first glance, but I didn't read any instructions yet.
IMPORTANT and helpful. I have had an unfixable problem with the icons for my addons showing up. Somehow, this addon fixed it! So I'm thrilled that I added it. Even after disabling and restoring my original theme, the problem stayed fixed. It would be really helpful if a developer could check on what this addon changed to fix that problem. I will check my about:config setting it to show only changed values.
I will be using this addon as soon as I have time to read all of the documentation.

Installed hoping it would enable changing color of parts of my chosen theme like text or icons, but whatever change you set, just overwrites the theme you chose with the ones from the extension. What's even worst is that the "revert all" button completely removes the theme, while the chosen one still shows as "enabled", so you have to first disable it enad then enable it again.

thanks firefox
we really liked this thing

Would love to use it more but why there is a ridiculous 5MB limit on locally saved themes. Is this a bug? limit on saved themes on local storage? Makes no sense..... deleting themes to free up space doesn't free up space. Themes disappear spontaneously. Export and no import of themes. Installing imported themes not possible - Firefox reports file as being corrupt. Still a much needed simple extension all things considered, please fix it.

This may be my favorite add-on. Controlling the colors makes me happy. I've just added it on my new computer.