Install Battle.net/Hearthstone on Linux using Steam | Ubuntu | Proton | Blizzard

We start Steam to start Battle.net to start Hearthstone. Recommend 1.5x speed. DO NOT REMOVE "Battle.net-Setup.exe" FROM YOUR STEAM LIBRARY. IT WILL DELETE BATTLE.NET AND HEARTHSTONE (unless you want to uninstall it, then it's safe of course). Probably works with the other Blizzard titles too, but have not tried.