firefox - follow link when in find mode

You can press Esc to exit the finder and then press Enter, or simply Ctrl+Enter to go to the link.

Press ' (single quote) and the quick find bar pops up in "links only" mode so that only links are searched. Enter your search and hit enter to follow the link. Hit Ctrl-g to jump to the next link containing your search term.

Found on the mozilla support pages here.