Hi @crx
There is no feature to auto refresh after a period of time. I also think that should be part of the website and not the browser, but I would need to better understand the use-case.
What website will you display and why do you want to go back to the default webpage after 15 minutes? - Let's assume the user is interacting with the webpage till the timeout is reached - I think it would be bad user experience to navigate automatically to a default webpage.