How to play YouTube videos in background

Don't you wish you can run your mrsuicidesheep playlist on YouTube, lock the phone and relax? Ofcourse you do. But due to ads, YouTube won’t allow. Now sure there is xposed plug-in that lets you run YouTube in background but it’s not for average user. It’s fairly easy, here's how it’s done

• first you need to download Firefox browser from playstore (free) 
• then go to youtube.com webpage 
• sign in to via Google account 
• play it 
• press home button
• step 3  : profit

Now remember don't kill the app from recents menu