Moxillas has released a real good ad on for SEO's that is SEO quake which is compatible with both Mozilla fire fox and Internet explorer. It allows to obtain and investigate many SEO parameters for the projects under review. It can be easily installed and used in day to day work. SEO quake is being constantly enhanced so that it tracks all SERP changes. It saves time, money and energy. Then why not to add it to your firefox or IE extentions rack.
The SEO Quake extention/toolbar is nothing at all like the Google toolbar. In fact the Google toolbar has no SEO relevance at all, it's just a spell checker, form filler or a search tool. SEO Quake gives you a lot of useful information about a domain which is very helpful for SEO purposes.