BrowserConfigHelper

This class generates browser configuration object
from manifestURL or src provided.

The configuration object is used for BrowserFrame generation.

• If manifestURL is provided, we would treat it as a web app,
  and then use Applications to fetch the remaining info we need
  to construct the options for mozbrowser iframe.

  
  



• If only URL is provided, we would treat it as a web page.

  
  

The returned configuration object contains:

• Origin: the same as appURL.



• manifestURL: the same as manifestURL.

  
  



• manifest: the parsed manifest object.

  
  

        If the app is not an entry point app,
        the manifest would be the reference of application manifest
        stored in Applications module.
        But if the app is an entry point app,
        we will do deep clone to generate a new object and
        replace the properties of entry point to proper position.

  
  



• name: the name of the app, retrieved from manifest.

  
  



• oop: indicate it's running out of process or in process.