perfect, just like safari :)

This did not function or perform as I expected or understood it to. I *wanted* for a website's color to be picked up by this extension and show translucent color. Instead all it did is turn every theme I installed into black tabs, black URL bar, black UI. Polar opposite of what I wanted. Clearly i must show "user error" but in which case you didn't do a good job at all of explaining the effect, nor show any examples. Now all I've been trying to do is remove and DELETE with prejudice since I cannot find its controls anywhere, I can't find it in my browser history. Sorry, I vote poor user experience design, even though everyone else seems to love it.

Works very well but on some sites the color is slightly off.

Unfortunate oversight of the addon being that the bookmark overflow menu is not affected by the colour shift which makes the appearence of the browser ui inconsistent, which can be jarring. Would love to see this issue fixed.

Its the BEST appearance extension ever. Most themes for Firefox are tolerable, not beautiful. This ext provide one of the best colors and borders scheme like mine - Borderless. Its feels really good with different color for each site, the most beautiful Ive seen from themes.
Thank for improving user experience as much as possible (for me ig)

Good extension. Would be cool if Mozilla built this in Firefox