The Java runtime ORB is part of the browser. Visigenic' focus is Enterprise computing, smoothly extending intranets to the Internet. Might be bundled and not a separate process. Piggybacks IIOP into firewalls. Call by Value RFP is the way to do this.
Issues remain with respect to web of objects and how much to move at once.
Browsers contain separate similar protocol stacks for mail, news, other clients today. Much footprint would collapse if OO protocols were used instead. Wrap as octets though not typesafe. If standard port, then that limits one ORB per machine. Standard default port but can use other ports.