I really like to try new things today! For example a few hours ago I had lunch at some place where I've been before but I tried something new and - fortunately - I am still alive and well. Moving to our daily Firefox addons it seems I also got lucky since WhoisDomain - All In One Site Lookup still appears marked as "Experimental" on Mozilla.com yet it seems to work like a charm for me so here you have it! ;)
Released yesterday WhoisDomain - All In One Site Lookup 1.0 has only a few KB in size is free and using it is really easy - just press one of the two buttons that appear inside the main window of your Firefox browser after installing it and you'll get a new page in a new tab that gives you most of the SEO stats-related information you will ever need: domain lookup(whois) Alexa rank server's IP Google PR index and backlink information and then some. Pretty cool if you ask me.
According to the official page on Mozilla.org that I just mentioned this Firefox addon works with virtually all Firefox versions you can think of namely Firefox 1.0 - 4.0. At last here's a really funny fact - the website behind WhoisDomain has PR0! Let's just hope this is because it's fresh on the market and not because some evil SEO techniques used... ;)