I am looking for resources where I can learn how to market and grow a chrome extension user base. Also interested in looking at any case studies related to chrome extension marketing.
It feels you're being a bit specific. Look for good marketing advice and the principles are very transferable. E.g. Read 'Ogilvy on Advertising' as a guide on how to communicate your product. The product is largely irrelevant if you understand the method of pitching.
I build a MVP cross platform extension bookmark/chat app that used http://kangoextensions.com - hope that helps :)