That doesn't work. The shitty web app is going to intercept the "go back" event as "destroy all user data, as intended" and you're fucked.

If this never happened to you, good for you, you lucky bastard. Now get out of the way, this is a quality of life improvement for millions of real people out there. Hard working people. Mothers and Grandmothers. Think of them while you are bothered to work around this slight inconvenience of yours.