"Because lots of people who build websites only test them in Chrome.." Well I am not one of those people. Back in the late '00s I was testing in IE6, 7 and may

"Because lots of people who build websites only test them in Chrome.." Well I am not one of those people. Back in the late '00s I was testing in IE6, 7 and maybe 8 as well as Chrome, Firefox, Safari, and Opera. I remember, back then, my boss telling me to "only worry about IE" when writing a demo web application. One day I came in and my boss slaps a peice of paper down at my desk, wondering why a customer saw this on their screen. At first I was like "WTF" as it was a bunch of rectangles scattered around. The penny dropped and tried it in firefox.. same result. It was at this point I started to care about ALL main browers regardless of what anyone told me. It is not as bad today, but my mind set is no different. Should not be testing on just one browser.