In the last week I released a Chrome extension that opens Yelp addresses in Google maps instead of the Yelp’s map interface. Here is a link if you want to download and use it – https://chrome.google.com/webstore/detail/yelp-to-google-maps/fpmjnpeaolcopddalaodjlabiplflnlb.
Making a Chrome extension is mostly straightforward and there are a lot of good links on the web to help you out. Here are the links I used to help me with my development.
Colorpeek, Part 2: Building Your First Chrome Extension
Day 29: Yeoman Chrome Generator–Write Your First Google Chrome Extension
Developing Google Chrome Extensions
Good luck!