Google enhances search for Firefox
Google will use the Mozilla Link prefetching feature to make user searches faster. I already see a potential problem here. Think of the cases where your search results include links to *inappropriate* sites which are normally banned from being accessed from corporate environs. Prefetching is no different from you actually clicking the link. So some users could potentially get into issues here. Luckily Google has a way to actually disable this feature as well.
Update : InsideGoogle notes another problem(?). Prefetching pages like this could cause websites to register a site hit even if no one actually visited the website.:)