Well, back in the day the FF devs said "no" to background-position-x and y in CSS (when we didn't had HTTP 2 and we used CSS sprites as a way to load websites f

Well, back in the day the FF devs said "no" to background-position-x and y in CSS (when we didn't had HTTP 2 and we used CSS sprites as a way to load websites faster by decreasing the number of connections). My reaction was to "sabotage" FF users by prioritizing IE and Chrome and not actively testing my websites in FF, but only waiting until users reported bugs. My thinking back in the day was: Why would I write N times more lines of code for a browser that had way less market share than Internet Explorer, especially when Chrome was faster and worked better? By the time Firefox corrected course and prioritized parity with other browsers (ie. the -webkit fiasco), their market share was already an order of magnitude smaller. 15 years later, I don't feel proud of my actions, but my own conclusion is that every individual action added up. Now I feel sad to see Firefox with less than 3% market share because the damage is irreparable now.