Speaking of that, I've had issues with Firefox (both on Mac and Linux) where some checkboxes just don't appear. I was checking in for an international flight

Speaking of that, I've had issues with Firefox (both on Mac and Linux) where some checkboxes just don't appear. I was checking in for an international flight last month on American, and could not manage to get through the checkin process until I discovered there was a checkbox I needed to tick that didn't even appear on Firefox (but which did on Chrome)..