I've turned wrap around on (did it in about:config, then with the actual button)
It seems to work fine on a lot of pages.
However, for some pages, it just doesn't. These seem to be "complicated" pages with sections (eg a section for comments).
eg on
http://en.wikipedia.org/wiki/David_tennant
(Yay Doctor Who)
Searching, for example, "parody" won't return a result if you are 'below' the instance of the word.
Actually...searching anything then holding down the enter key just makes it hit the bottom of the page.
Any ideas?