"Sometimes if you mistakenly type some URL in the
browser, or open some link, it would show up in the address bar,
because of the auto completion feature. No, I am not talking about
Porn sites, for which its always better to start private browsing
by pressing CTRL+SHIFT+P. I am talking about misspelled sites, etc.
which you can remove by selecting the URL using up and down arrow
keys in the address bar auto completion list and pressing the
DELETE key."