SamyGO

here is no WebTools directory on your mtd_appext like on GASDEUC and GAPDEUC where Browser exists. SO, don`t play with configuration files, search deeper.

Why do you use C series exploit for D series? I think soon we get your help request for repairing bricked tv, because you're trying all exploits you find here
I said, browser needs more than just change model or config files. Take decrypted appex.img from higer modells and study what differs here. I already tried to mount this from rwcommon directory instead of my original partition, seemed browser found required filed on this old brothers appext partition, but anyway it freezed on start...