If you want to go off the records while browsing websites on your android device, you can achieve private browsing or be incognito by using Chrome or Dolphin HD Browser. Is there best private browsing app for Nexus 7?
There are many to choose from and my favorite is Frost Lite private tabbed web browser by Crowbar Solutions. It comes with hidden, password protected image and bookmark stash for saving media with complete privacy, even automatically clears all history and reset after you close the app. Robust set of options is very handy.
Frost Lite works great for nearly all purposes on my tablet and absolutely no crashes. Loading webpage isn't as fast but privates. If your family or friends want to see your device, you can let them use it without worries.