When doing research on the Internet the last thing you want to do is have to scan
an entire page of nonsense when you can just hit a shortcut key and search for a keyword.
The common proceedure is: Hit Ctrl-F and type in your query
Firefox 4 offers >>> an even quicker way <<< to search for something on a page?
Just hit, the / key on your keyboard (located just to the left of the Shift key)
and start typing!
Finding the word your after has never been so easy. ;)