Make sure requesting permissions in the popup works - might be a blocker if it doesn't, works but closes the popup when clicking on the permissions doorhanger, not sure if it's worth it then. workaround might to still keep the full preferences page around and open it when permission is required, or open an bugzilla ticket and ask to fix that. this would be a non-issue with #432
Popup should be shown by default when left-clicking the icon
Default Popup view should be the General preferences
Defining the default popup view should move from Advanced to General
Icon should move from the navbar to the tabstrip, since it isn't an "alternative new tab button" anymore by default
Middle/Ctrl mouse clicking the icon should open a new temporary container tab (#362) (put a tip somewhere in the popup about this behavior)
Preference to get the old behavior back
Existing users keep their current behavior
Needs the icon to change to something that works on dark and light backgrounds
Make sure requesting permissions in the popup works - might be a blocker if it doesn't, works but closes the popup when clicking on the permissions doorhanger, not sure if it's worth it then. workaround might to still keep the full preferences page around and open it when permission is required, or open an bugzilla ticket and ask to fix that. this would be a non-issue with #432