11.8.800.94 is the version firefox browser and vista 32bit
My Win7 machine used to do this ALL THE TIME on YouTube.
I uninstalled BOTH Shockwave and Flash Player from the Control Panel>Programs and Features
Then I downloaded the Shockwave FULL installer and the offline Flash Player for ActiveX (Internet Explorer) and Flash Player Plug-in (All other browsers), and installed them - Shockwave first and then Flash Player(s)
After that I didn't see the "crash" again.