Default Play Store Loaded Automatically by Websites on KitKat

Since I've been using KitKat a website that I use often automatically loads the Play store to try to force me to use their not very good app.

If I try to swipe away the Play store then it crashes and I'm left no longer in the browser. As a result, I've suffered from random reboots and overheating.

I've managed to solve the problem by doing a factory reset and uninstalling the Playstore before using the website. I've got a copy of the Play store app which I install when needed, but always uninstall it before using the website that automatically loads it.

I now very rarely get reboots whereas before I was getting several a day and my tablet no longer overheats.

Does anyone know of a way of stopping a website automatically loading the Play store in KitKat?