you should NOT ground your chair directly, only ground it through a large resistor, 100K or so. (you might want to check that value, it's from memory, I think you want any potential electric "shock" to be down below the 1 milliAmp range)

I'd use a ground strap designed for wearing while you handle MOSFET ICs.

if you ground your chair directly, it is likely to make YOU be the best circuit to ground when you handle your computer or monitor's AC "mains" (us "uk") power cords.

The resistor will allow static discharge (very few coulombs at very high voltage) but limit the flow of electricity