*final conclusion

ive been using alternate twitch player between oct '20 and february '21 due to twitch overblowing their ad deployments. however over the past month ive switched back to the standard built in twitch player and ive been faced with, well a reasonable amount of ads really. and their video quality has improved drastically (better than alternate player quality in some cases). just recently theyve FINALLY aligned the theater mode player to have even top and bottom black bars (which has prompted my final conclusions here) so i must say that as much as i now fully recommend sticking to the original twitch player, this still has its use cases as being a very efficient player (5w on my laptop compared to a jumpy 6-9w with the built-in player) and as well being very responsive and less obtrusive. however with the lack of FFZ compression and the comparative quality of twitch's built-in player, i will use theirs for the foreseeable future.

thanks for the extension which saved me for some months from pulling my hair out.