thats a bd-jb userland (private) chained with kex for 13.50 (private also) if sony has patch both bugs on the 13.52 fw then maybe after 6-8 months gezine may release it. but what most ppl really cared is the webkit exploit the higher can be used...
try this and forget usb loader for different region discs. when powerup wii press reset and bring the priiloader menu (if you have priiloader instaled) and launch dvd drive it will definetly work.
The upcoming release already improves compatibility in a big way, but there's still more work to do.
I know people would like me to make their incompatible drives work correctly, but unfortunately it's not that simple, since I often need to...
fw 9.xx is what is worked on the most. also there is a possibility for a new webkit impacting up to 13.xx fw. for now the bug exists but all remains is to see if the webkit bug can actually turned to userland exploit. but if 13.xx gets a webkit...
also since youre gona need internet for the browser to cache the page. make sure auto downloads and auto install is disable. that way your system wont download any unwanted updates. trust me i never pull out from internet but with those suggested...