Mint version ,
Firefox version ..
Some background info on that error
First thing to try is memtest, you may get the option when you boot up (in grub menu )
You may have bad memory, so rule that out first ..
If you get memtest errors , try removing 'sticks' and see if things improve, I.e. re-run nemtest
Search for memtest86+ if you get stuck..
if mem seems ok, come back with the version info, plus anything else you may think of..