- safari 10 - pretty bad covers (2 users)
- safari 9 - assuming as bad as 10 or worse (3 users)
- IE 11 - covers look bad (3 users)
- IE 8 - covers look bad, probably everything else too (3 users)
- Total: 1.5% of all users (11/730) have bad looking covers (1.1% if we ignore LOL IE8)
- safari 10 - pretty bad covers (5 users)
- safari 9 - assuming as bad as 10 or worse (4 users)
- safari 6 - 2
- IE 8 - covers look bad, probably everything else too (1 users)
- Total: 2.6% of all users (12/457) have bad looking covers (2.4% if we ignore LOL IE8)
- edge 18 - covers look fine
- edge 15 - covers look fine
lambdatest.com has a $10 manual usage pack (only site I've found so far where you don't have to buy a monthly or annual subscription