1. Because of the age of this camera, it does not support anything other than an IE 6.0 or above browser. firefox and chrome (or any other java only based browser) are not supported for Live Video. If it is not working most likely it is due to the security settings on your IE Browser and not allowing the DCS-5300G codec to install.
2. This is a little outdated but you can access it remotely by setting up the following, http://www.dlink.com/support/faqDetail/?prod_id=1433
Your revision confuses me, there is either revision A or Revision B. Which are you using? In either case you should updated the firmware because you would be a few years behind on either one if you had 1.00 still...