Rated 4 out of 5 stars

Nice try! But I think that the country flag shows up differently for some sites. For example: the country flag for this site shows up as "China" and while using the flagfox addon, it shows up as "Singapore".

Other than that, good effort and like another user says, it should the full name of the country.

This review is for a previous version of the add-on (2.5).