How to get access to IDE settings

Is there a way from the openapi to get access to the IDEA settings? Not those associated with my plugin, but the generat settings for the IDE.

More specifically, I want to get the path to the web browser, so I can invoke it in a platform independent way (I know of the Mac and PC ways of doing this, but would prefer a way that worked for linux as well, that didn't require special preferences).

Thanks,
Mike