I solved this bug by simply selecting the Shockwave Flash plugin to the version 9.0 r999 in the Firefox Tools menu/Add-ons/Plugins. Disabling the 2 other flash versions I have (10.1 r53 and 10.1 r999) and enabling the older version 9.0 r999.
I solved this bug by simply selecting the Shockwave Flash plugin to the version 9.0 r999 in the Firefox Tools menu/Add- ons/Plugins. Disabling the 2 other flash versions I have (10.1 r53 and 10.1 r999) and enabling the older version 9.0 r999.