If you want to keep your browser clean in Mobile Safari, it's easy to do. Here's how to set up Mobile Safari so it opens up to a blank page every time you launch it.
First, launch Mobile Safari on your iPhone, iPod touch, or iPad.
Clear the address bar by tapping on the white X in the address bar.
In the address bar type: about:blank
Tap the Sharing button. Select Add To Home Screen.
Now give the icon you just created a name. This name will be the icon's label.
A new white icon appears on your iOS device's Home Screen. Now move it to another screen or put it into a folder if you like. Every time you tap on that icon, you'll get a blank screen.