I found a ad on that helps you identify dot follow blogs when you come across them. I followed there download instructions. Once downloaded you are suppose to look on you tools bar to the upper right hand corner for a blue button .I looked on my Google toolbar on my firefox browser and it was not there, Then I tired the keywords firefox tool bar and various conventions and could not find a firefox tool bar. I figured getting a firefox tool bar that this ad on would surely show up on it but I could not ever find one. I have no experience with ad ons so I might need some help to get this to work. Here is the site I am referring to, http://www.bashbosh.com/recognize-dofollow-from-nofollow-links/
you can also use NoDoFollow to find nofollow/dofollow links in blogs and other sites here: https://addons.mozilla.org/en-US/firefox/addon/5687