hello, this sounds like a problem possibly caused by adware on your pc. please go to the firefox ''menu [[Image:New Fx Menu]] > addons > extensions'' & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc). <br>also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there. <br>finally, run a full scan of your system with different security tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] & [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner]. [[Remove a toolbar that has taken over your Firefox search or home page]] [[Troubleshoot Firefox issues caused by malware]]

Our ABC.net.au iView advises cause is the version of Shockwave FlashShockwave Flash 11.2 r202 They tell us to use Google Chrome (or Chromium) which uses later version of Shockwave FlashShockwave Flash Similar warning on the Adobe Flash pages BTW my plugins set to Always ask to Activate.