Actually FS and Singularity use components from Linden Lab which is the HQ for Second Life. They use a platform called autobuild and then add various plugins on top of that. I suggest look at the wiki for SL, FS, Singularity viewer. Some of the components I feel and I can be totally wrong can be used with BJS. I also read about a html viewer called Pixie viewer and suggest to look into that as well. There is a viewer out or if coming out that was made with Unreal Engine which I feel is like BJS so I do think BUS can get it done 
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@Wingnut the reason I felt that way is because I feel using HTML5 will take less components which will make it easier to load for folks. When I load FS and I’ve done this on both Windows & Ubuntu and it seems like it take forever.
@nasimiasl I’m totally down to work with ya on this if interested…Im going to do more research on my own as well!