Rated 4 out of 5 stars

It works, but I would prefer if it was a search engine add on, I mostly search whois for urls other than ones I am surfing to. Would be a far more useful tool if it was a Search Engine add on.

DAC WHOIS SEARCH (from Domains-At-Cost) Rated 5 out of 5 stars

Nice handy little utility! You get an icon at the right end of the URL address line. Just click it for the current website or page you're on and you get a complete WHOIS listing of the site's domain name. (If re-directed, you get WHOIS for the page you're actually on.)