Hi

There are two ways to look at this problem, the first is to fix Flash, the second is to think about whether you need Flash.

If you want to try to fix Flash, I recommend you have a read of this article that will walk you through how to solve various issues.

If, however, the video that you want to watch are on YouTube, you do need to have Flash installed, they will play just fine in Firefox without it as it already has the ability to view certain formats "built in". I do not have Flash installed myself and am able to view YouTube movies without a problem. If you wish to remove Flash from your computer, you can follow the method to do so here.

I hope this helps, but if not, please come back here and we can look into a different solution for you.

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 (Flash 11.3+ on Windows Vista and later)
• disable hardware acceleration in the Flash plugin
• disable hardware acceleration in Firefox
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting
• https://support.mozilla.org/kb/adobe-flash-protected-mode-firefox