Creating protocol handler in new Firefox?

I just came to know that Forefox no longer support XPCOM component for creating extensions .. I want to create an extension which will handle my protocol which will collect information from different sources via my NPRUNTIME plugin and render webpage accordingly .. in past I used to create protocol handler by implementing nsIProtocolHandler

but as there is no XPCOM support in new Firefox for extension development .. How do I approach issue ?开发者_开发问答 Is it possible in New version of firefox?

I don't know where you "came to know" that Firefox will no longer support XPCOM components in extensions. There have been some changes for Firefox 4, but it's still supported and not likely going away any time soon.