[noisem4ker]

With Android, I believe you could always run anything you wanted in the background, provided you had enough memory. Starting with versions 5-6, restrictions have been put in to prevent abuses and battery draining with the user unaware of it. The two OSs converged towards a mean point from opposite directions in this case.

[kevin_thibedeau]

They're inconsistent. On Firefox Android you can't play in the background using the mobile site but if you switch to the desktop site all of a sudden background play starts working.

[noisem4ker]

That's because Google deliberately prevents background playback on mobile devices, bringing mobile browsers down to the same level of the YouTube app using shady JavaScript APIs. This add-on should fix it: https://addons.mozilla.org/en-US/firefox/addon/video-backgro...