just to say that i temporary resolved the problem by: sudo mv /usr/lib/swfdec-mozilla/libswfdecmozilla.so /usr/lib/swfdec-mozilla/libswfdecmozilla.so.disbaled ( you may or may not need to reinstall flashplugin-nonfree) and restarted firefox.
just to say that i temporary resolved the problem by: swfdec- mozilla/ libswfdecmozill a.so /usr/lib/ swfdec- mozilla/ libswfdecmozill a.so.disbaled nonfree)
sudo mv /usr/lib/
( you may or may not need to reinstall flashplugin-
and restarted firefox.