When carrying out SEO research there’s a number of application and websites out there that can assist you in your efforts – Google’s PageRank checker, Yahoo’s site explorer as well as multiple keyword research tools.

At the end of last week SEOBook launched a new extension for Firefox which aids the process by grouping a number of these key applications into one handy toolbar.

I have been using this for a few days now and the early signs are encouraging, it certainly makes the process of evaluating a site much quicker.  Combine this with Firebug, which I find incredibly useful when assessing a site’s on site SEO efforts, and you have a whole range of key SEO tools all within the one browser – which certainly  makes life a lot easier.

Try it out and let us know what you think.  If you think there are other key SEO extensions / websites / applications out there that complement your SEO efforts, then share them with us via the comments below.