After installation, just do the typical ‘inspect element’ action and you’ll see the new ‘Reference’ tab. Click the tab and you’ll see information about the element you chose plus any attributes that are defined for that element. You’ll see information about the element, what browsers support it, and a ‘more’ link to the reference section on SitePoint’s website.

I have always respected SitePoint for being a leader in almost everything related to web development. They have published books on a wide variety of internet technologies and continually push out new content. I’m sure this new plugin will help spread their knowledge to more web developers.