Too lazy to test probably. If you support IE, Safari, Chrome both on the desktop and mobile, chances are that your site supports practically everything. Unfor

Too lazy to test probably. If you support IE, Safari, Chrome both on the desktop and mobile, chances are that your site supports practically everything. Unfortunately, often giving the official thumbs up requires passing some test suite. If companies have gotten better with their development methodology, their testing methodology is still often "Take a bunch of guys in India and have then run through that extensive check list".