Vérifier et au besoin maj le plugin flash.
Largment inspiré de cet article.
Recopié ici car trop de site disparaissent.
[21:32:17] jm@xps13:~$ sudo update-flashplugin-nonfree --status
Flash Player version installed on this system : 11.2.202.425
Flash Player version available on upstream site: 11.2.202.451
flash-mozilla.so - auto mode
link currently points to /usr/lib/flashplugin-nonfree/libflashplayer.so
/usr/lib/flashplugin-nonfree/libflashplayer.so - priority 50
Current 'best' version is '/usr/lib/flashplugin-nonfree/libflashplayer.so'.[21:32:40] jmfrouin@xps13:~$ sudo update-flashplugin-nonfree --install
--2015-03-19 21:33:08-- https://fpdownload.macromedia.com/get/flashplayer/pdc/11.2.202.451/install_flash_player_11_linux.x86_64.tar.gz
Résolution de fpdownload.macromedia.com (fpdownload.macromedia.com)… 2.16.120.8
Connexion à fpdownload.macromedia.com (fpdownload.macromedia.com)|2.16.120.8|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 7244055 (6,9M) [application/x-gzip]
Sauvegarde en : « /tmp/flashplugin-nonfree.brtEaVOgbm/install_flash_player_11_linux.x86_64.tar.gz »