Today I stumbled across an interesting new Firefox extension: FireScope. It’s developed by Sitepoint, a site I visit regularly. I was aware of their reference material on html, css and javascript and now they use that content to feed this extension. FireScope is an extension to Firebug, assumably known and installed by anyone interested in FireScope. On the official firefox add-ons page it has the status ‘experimental’ and hence requires logging in.…