Great addon--can go places with some more effort! Rated 5 out of 5 stars
Urim is a nifty addon. It generates the results on the fly and in real time. My primary use case is to find what are the primary keywords and where they occur on the page. Thanks much for creating this.
I have reviewed it in detail, along with sharing use cases and tips at http://twtools.wordpress.com/2013/06/20/generate-tag-cloud-of-keywords-on-any-page-using-urim-firefox-addon/