F5

From The LURKMORE Wiki

F5 is a function key. AFAIK, there are F(x) keys on PC and Mac. If an internet page is not loading correctly, hit F5 and wait. If you give it some time and it still doesn't load correctly, hit F5 again and wait some more. If that doesn't do it for you, there's always tabbed browsing + F5. Unless you suck.