I just tried it on Firefox 2.0.0.1 in Feisty, and doing exactly the same thing doesn't find the word (it does find it in this page, since it uses regular quotes, but not in the link above).
I just tried it on Firefox 2.0.0.1 in Feisty, and doing exactly the same thing doesn't find the word (it does find it in this page, since it uses regular quotes, but not in the link above).