Severe crashes like that usually result from incompatibility with a device driver, particularly a display driver, the software associated with your system's graphics card or chipset.

Could you try this article: Upgrade your graphics drivers to use hardware acceleration and WebGL.

Is Pogo using Flash or Java? If it's Flash, you can disable the Flash plugin from using hardware acceleration as a workaround. Right-click the Flash media in the player and choose Settings, then the first mini-tab and uncheck the box to use hardware acceleration.

More information in this support article from Adobe: http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues

Hopefully that helps.

You can check for problems with current Shockwave Flash plugin versions and try this:

• make sure you have the latest Flash version:
  http://www.adobe.com/special/products/flashplayer/fp_distribution3.html
• check for updates for your graphics drive drivers
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
• disable protected mode in the Flash plugin (Windows Vista and later)
  https://support.mozilla.org/kb/adobe-flash-protected-mode-firefox
• disable hardware acceleration in the Flash plugin
  https://helpx.adobe.com/flash-player/kb/video-playback-issues.html
• disable hardware acceleration in Firefox
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting