How can I detect the firmeware of my DVD burner ?

I am finding out the default factory settings (from manual) are restricting me to so little DVD brands available out there. Ex: I cannot find Dual-L brands matching the manual.

I figured if I can update the firmware, I could probably have more available.

I have my burner for about 5 years and I think I upgraded the firmware once but I am not sure. I want to also check my CD-ROM for the same thing.