I used to use Firefox to listen to YouTube to get past the ads and the app would continue running with the screen turned off. An update to the app disabled this ability.

If possible, please fix the bugs in the update which disabled my ability to enjoy using firefox. I used to use Firefox to listen to YouTube to get past the ads and I could turn my phone off with Firefox continuing to run in the background allowing me to continue listening. after an update to Firefox occurred, the Firefox app would stop running in the background when I turned the screen off on my new Samsung phone.