Earlier quoted context omitted.
A couple major releases ago. To be fair, most of this isn't new, but other problems had precluded my ability to move for a long time to enjoy these features. For example, the app we developed at my workplace was painfully unusably slow in Firefox (even slower than Edge sometimes!) I also previously had problems with single tabs causing stuff to lock up or at least respond slowly. This happened with SoundCloud a coupl…
> the app we developed at my workplace was painfully unusably slow in Firefox Have you considered addressing this bug?
Of course, the app is being improved too, but apples to apples, Quantum makes it better.