Hi, Does anyone know any tool or mozilla plugin which can differentiate nofollow and do follow on the SERP (search engine result page) itself?
Your question does not have an answer, AFAIK. Checking if a page has follow or nofollow links comes only when you browse the page and the tool on your computer actually parses the HTML code for the rel="nofollow" tag. Hence it cannot do it on the SERP, unless anyone out there is sick enough to write a plugin that loads every page "in the background" and check. HINT- plain Google Search will allow you to do something similar if you craft well your search string. Good luck!
There are various firefox plugins that will help when you are on the page itself. I like the SEOMoz one.
Even if such a tool exists it would be pretty much worthless. The only way a tool like this could work is if it were based on the absence or presence of <meta name="robots" content="nofollow"> which nofollows ALL links on that page. It "could" also specify pages not followed as the result of a robot.txt disallow I guess, but mainly it would likely use the meta robots element. So a tool (if it exists) "could" tell you whether or not ALL links on a page are nofollowed by the meta robots. But it is VERY rare that someone would use <meta name="robots" content="nofollow"> because it also nofollows internal links on that same page which is usually not desirable. But if the meta robots is missing such a tool would say the page is followed... which is the case probably 99.9999999% of the time. But this doesn't mean that all links on the page are followed, just that they have the potential for being followed. A blog post page is typically followed at the page level (the level the tool would be looking at) but each of the comments are typically nofollowed 99.999% of the time. So the tool might rule out nofollow pages 0.0000001% of the time. Not even worth the time and CPU cycles necessary to install and run the plugin IMO.
Well, if i am not getting wrong....you mean to say i should try google operators (to find specific types of blogs which are do follow) by trying well-crafted search string. OR could you please give any example of well-crafted search string to find do follow blogs.
SEO Quake does it, in an add on for firefox. However, it's not 100% reliable. It makes mistakes from time to time. But if you need to thumb through pages nad pages of results, this is the fastest way I've found.