Oh no! That actually should've worked as described (not auto-playing until you switch tabs), but it looks like auto-play suppression is in 54, not 53. Sorry :(

Oh no! That actually should've worked as described (not auto-playing until you switch tabs), but it looks like auto-play suppression is in 54, not 53. Sorry :( https://bugzil.la/1308154 https://bugzil.la/1308154