Clarity should be compatible with the most recent versions of all major browsers, including mobile browsers. If you encounter a bug, you can email support@clarity.fm and we'll do our best to fix it as soon as possible.
This is a great question, and my best Googling / Amazon-searching efforts aren't turning up much. Maybe time to write that book :) After considering this one for a bit, I can also imagine why this would be a tough book to write. With browser technology iterating relatively quickly, and with new ...