First seen in 2009, Webmaster & SEO. This page records what the extension did, whether it is still available, and what to use instead.
What it was
Nofollow Checker, written by Dan Cryer, highlighted every link carrying rel=nofollow on the page with a coloured outline, the quickest way for SEOs to see which links pass authority. The same job is done today by NoFollow and by the SEO toolbars.
Succeeded by NoFollow
The earlier extension is gone, but its role is filled today by NoFollow, with 100K users and a 4.3 rating. See its statistics and history.
Current alternatives
The extensions the Chrome Web Store ranks highest for "seo" today.
