I had 2 blue screen crashes with Pale Moon.
Firefox seldom does that.
Never have had a one on any of the machines here — XP and Linux.
Microsoft's fault.
By the definition of "blue screen", it should not be possible for either Pale Moon or Firefox to cause one.
BTW, if you are still using Windows, here's a fun screen saver: http://technet.microsoft.com/en-us/sysinternals/bb897558