Just want to share with you something I discovered - it appears that the multiwindows feature that samsung introduced to our phones with the JB leak also comes with a feature called MULTI-INSTANCE. What that means is that in multiwindow mode, you can launch the same app multiple times - well, two instances for stock multiwindows (maybe more than two for floating multiwindows in the case of NOTE10.1?). Not all apps can be launch multiple times though. Some apps can, some apps can't. For some reason, I could not make any browser I have installed to launch multiple times. Maybe there is something in their code to make them launch multiple instances. This is the reason I am sharing this now at this early stages so maybe some dev out there talented enough to hack the code can help. I am not very good with code. I am just a curious noob not afraid to explore and learn.
So this is early stages and maybe samsung is only in early development of this feature so it may or may not work on your phone, it may or may not work for apps you want. There is a bit of exploring to do to make them launch multi-instances (sometimes you think it is not working but one instance is just hiding behind the other and you need to learn how it works).
* Make a backup before installing so you can restore. Flash via CWM recovery. This is only for rooted deodex LSC ROMs for now. (Maybe odex will come soon). This MOD may or may not affect other mods that you have already installed. As always, flash at your own risk.
I would appreciate feedback and suggestions.