This extension is to analyze the HTML source code (without DOM modifications done by Javascript) of a website and to display SEO relevant information. I know, there are many extension available like this, but I think the advantage of this one is to display the important information compact in a quick an easy way. Just click the icon, and a little popup shows up.
This is just a first version of this extension, so feedback is very welcome!
Icon by http://designmodo.com