This is what I ended up with, but looking back into it and localhost:%s/ is a valid search engine string but http://localhost:%s/ http://localhost:%s/ is not.

This is what I ended up with, but looking back into it and localhost:%s/ is a valid search engine string but http://localhost:%s/ http://localhost:%s/ is not. This script is made as a reference after I'd already done the setting so assume it needs editing to work.