If he's smart, he uses the private mode to watch it, so history is not saved.

Or he clears the history.

Check the history panel.

Trayray said

I am sure about porn browsing I just cant find it . He's smart that's why he chose your browser, please help me!

What do you wish to accomplish? Do you want to confront your child about this? "Catch them" doing it? Have you had previous discussions regarding using electronic devices for such things?

If you have set rules and expectations beforehand and you think your child is breaking these rules, it may come down to monitoring, limiting and removing access to the device. The technology and the access to it is a privilege, most likely provided by you.

Also, technology cannot parent for you. You still have to parent.

If this child of yours is too young to access or discuss such material, the child should not be given technology which can access such material.

With that being said, if all you want to do is have a means to prove what they are doing:

If your child is accessing the Internet on the home wifi/router, you can access the wireless logs and check which sites that particular device is navigating to. Some wireless logs may be limited, depending on the wireless router model and the features it supports. I may be able to assist you further with this if you can provide your model.

If your child is accessing the internet using cellular phone data, you might be able to contact the provider, of which I'm sure you're the paying account holder of, to see if they provide data use history/statistics.

Again, you are the one who is most likely paying for all of this. If your child cannot follow the rules, you can simply take the device.