You could also try running the play game tab in a different browser. Look into what browser takes up the least amount of memory. Although, doing that might not allow you to use an adblock extension, i'm not sure depending on the browser. You might want to try Firefox, I know it has extensions.
Anyway, yes the Play Game tab has proven to be a hassle for several users, but it is a necessity. It's there for a good reason. November of 2015 there was a bad hack and the login page is preventing something like that from happening again. And from what i've heard, it is also preventing people from hacking and gaining your login information.