IS IT POSSIBLE TO WRITE XPCOM COMPONENTS IN JAVA AND REGISTER THEM TO MOZILLA?

Hi, all:

Is it possible for us to write a XPCOM component in Java and register
it to Mozilla so that the Mozilla browser can use that XPCOM
component?

If I cannot write a XPCOM component using Java and register it, could
I invoke the JVM of Mozilla separately in order to let my Java
application communicate with that JVM in Mozilla?

Thank you in advance.

Ross