@Nuno Sousa: it all depends on how you architected the project. For example, a) if your using templates then Page Inspector will map back to the template, b) if you get an response from the server that's in HTML format, we are investigating different options to map these requests even, c) if  you get a JSON or XMl response from the server and generate everything dynamically (even the HTML tags), there's no way to know which line of JS injected elements in your DOM so we won't map to anything here. 

Hope this answers your question! Let me know if you would like to chat more about this or have any ideas on feature requests!