Hindsight is 20&#x2F;20, but when the wontfix decision was made it wasn&#x27;t clear that there was significant impact beyond the one addon which reported it -- which had already implemented and shipped a simple workaround -- and the missing file had been missing for nearly 2 months on beta. This was just a few days before shipping already-final code to hundreds of millions of people, which isn&#x27;t a time to be taking changes lightly. (And as a fun hindsight-in-hindsight twist, it now turns out the millions-of-users addons wasn&#x27;t actually as badly broken as described.)<p>It all worked out ok in the end, and could have taken a much better path, but it&#x27;s not as egregious an issue as you make it out to be. A mistake was made, and it got fixed as soon as we realized it was a mistake.