A massive issue with iframes is the browser back button, if you click 10 things inside the iframe and hit back in the browser it will start to navigate the ifra

A massive issue with iframes is the browser back button, if you click 10 things inside the iframe and hit back in the browser it will start to navigate the iframe history, not the parent and I do not know any way possible to have a normal navigation inside the iframe without filling the browser history with its pages.