Add-on appears to work great. But it is ugly. The drop down menu, while clear, is so plain and doesn't really match the aesthetic of the rest of the browser. Also, the icon for it feels so out of place, it needs polishing. An add-on should provide additional features in a clear, native appearance to the user's OS and the web browser itself. Function over form is bad in this case.

Why it doesn't work with privacy.resistFingerprinting enabled?