can not delete icons, they are built into firmware
you can not update the firmware o these no brand generic player, only branded players from china have that luxury, sorry, but you are stuck with the firmware that the player comes with
as for backing up the firmware, yes you can as this is a newer rockchip player (rx2706)
please se this guide on how to access the firmware and back it up
http://www.mympxplayer.org/firmware-...s-vp53329.html
but again, no updates