In Windows 10 Mobile builds 10 147, now the Microsoft Edge browser has the ability to play music even if you minimize the browser.
This feature is quite convenient for you to just listen online music on websites, user can also comfortably use other applications not required to open the Edge Microsoft Browser every time. In the past IE browser on WP 8.1 can do it, now turn to Edge. Interestingly, this feature is also applies to video, now you can go to YouTube.com to select your favorite music clip, when you return to the home screen or another app the sound of the video still running in the background.
The possibility of the background video playback was not available on the IE, only new Microsoft Edge browser has it.