Hi beth.mansfield, I am sorry to hear that the update led to Flash not working as expected. However there are some troubleshooting steps that can be taken to diagnose the issue.

• Does this happen in Safe Mode?Diagnose Firefox issues using Troubleshoot Mode
• Does this happen when hardware acceleration is turned off in flash player?
• Does this happen if you reinstall flash? http://get.adobe.com/flashplayer/

If you have problems with current Shockwave Flash plugin versions then check this:

• see if there are 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)

https://forums.adobe.com/message/4468493#TemporaryWorkaround

• disable hardware acceleration in the Flash plugin

https://forums.adobe.com/thread/891337 See also:

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