The problem is that it won’t stop people from using Google. Most people probably wouldn’t even notice aside from having to spend more time searching for local things, which incidentally will give Google more ad money.

The average person probably doesn’t know that search engines other than Google or Bing (or maybe Yahoo if they’re old enough) even exist. As much as it worries me that most of Firefox’s revenue comes from having Google as the default search engine, regulating that practice might actually give other search engines a chance to be seen.