Software to highlight all the same words?

is there a software that can highlight all the exact same words, including the word within a link, on a web page?
(below is an example with the word "rumours" highlighted :) )

http://i.domaindlx.com/deletrius/highlight.jpg

Thank you!

P.S does firefox or IE6 have this feature? :naughty:

Edit\find on this page?

FF extension
I don't know about IE, because I almost never use it.