We have the students logins set to open to a specific page and for the most part it works. We're seeing on a few that does work and then after the login finishes it changes page to another site crazygames.com which our content filter blocks. I'm sure these students have changed some setting (we cannot go to settings on the device becaus eit changes that page to crazygames.com as well) to do this but I cannot find what. It follows the login so if I login as that user on another device it does it as well.
Does anyone know what may cause this? We only allow certian extensions so they cannot add them.