Icon is minimalist ! Rated 4 out of 5 stars

Works fine (for cookies anyway, haven't tested with history), so my point here concerns only the icon other than that of the tab context menu: it resumes to an x , no frame no color, a plain tiny x
Looks horrible, hard to find/see :)

This review is for a previous version of the add-on (0.11.2.1-signed).