> Mozilla's biggest mistake is simply that after Firefox 3, Firefox was significantly surpassed in quality for many years by at least Chrome, maybe also Safari. Luckily Mozilla has closed the quality gap and is shipping a great browser today, but that painful period is probably going to continue to haunt them for a long time.

There is a surprising amount of parallel here to how IE was surpassed in quality by Mozilla/Firefox after IE 6, and that painful period is still haunting IE/Edge.

Not saying it's exactly the same situation, but history rhymes.