Worked for me! Thank you so much.
Disabling “Intel HD Graphics” in Device Manager worked for me, I’m not on a laptop. FPS in menu is now smooth omg finally… Looks like BlizzardBrowser.exe is not slamming my CPU anymore either.
I couldn’t chat, browse games, or anything before this; the 5 fps in menu was basically giving me depression lol. Very happy now, thanks.