I keep getting this message in Firefox v28. I have tried uninstalling Flash, but that doesn't cure it. I looked to see of Shockwave is installed, but I didn't see it. I even tried re-installing FF, but no help there.
How can I fix this, and what is causing the problem here?
Found this thread on the Mozilla Support forum which may help https://support.mozilla.org/en-US/questions/977465 and http://www.ghacks.net/2014/02/05/sim...using-firefox/ but if Shockwave isn't listed then you will need to reinstall it.