PleasE AvoiD using swf to publish online contents :
sudo apt-get remove flashplugin-installer flashplugin-downloader flashplugin-nonfree-extrasound dpkg -S /usr/lib/mozilla/plugins/flashplugin-alternative.so
gnash opensource player :
sudo aptitude remove swfdec-mozilla sudo aptitude install flashplugin-nonfree xul-ext-flashblock cd /etc/alternatives/ && for t in *flash* ; do sudo update-alternatives --config $t ; done
MisC :