If you are using internet on your friend's pc or on internet cafe, then you can use opera to browse private websites to prevent from tracking. In this case, nothing will be saved including history, cache, passwords etc
Lets start the trick, right click any where on the empty side of opera browser as shown in image. Then click on Private Tab...
Now a tab will be opened as shown below, now start private browsing without any fear.
SHORTCUT: Ctrl+Shift+N
