I wish these three bugs were debugged. Rated 3 out of 5 stars
1. When I set the minimum font size to a bigger font, I can't see the toggled on counter fully.
Edit -> Preferences -> Content -> under Font Color & Size, Advanced... -> set Minimum Font Size to 16
2. When I visit about:addons, I see a weird looking icon in the address bar.
3. When I toggle on the counter, a big empty right-margin appears.