Con il plugin che mi hai linkato non crasha più ma non vedo ancora nulla.
Il terminale mi dà:
~$ firefox
http://www.rai.tv/dl/RaiTV/diretta.html?cid=ContentSet-37f0f5d4-af33-48df-9281-2d46214c1b5d** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
PluginXamlLoader::TryLoad, filename: /home...., str: (null)
PluginXamlLoader::TryLoad () succeeded.
FileSource<-1>::ReadInternal ('/home/.....): Could not read all the data, eof reached. Current position: 180
FileSource<-1>::ReadInternal ('/home/......): Could not read all the data, eof reached. Current position: 180
FileSource<-1>::ReadInternal ('/home/...): Could not read all the data, eof reached. Current position: 180
....
(firefox:6408): Gtk-CRITICAL **: gtk_text_buffer_get_insert: assertion `GTK_IS_TEXT_BUFFER (buffer)' failed
(firefox:6408): Gtk-CRITICAL **: gtk_text_buffer_get_iter_at_mark: assertion `GTK_IS_TEXT_MARK (mark)' failed
(firefox:6408): Gtk-CRITICAL **: _gtk_text_layout_get_block_cursor: assertion `layout != NULL' failed
(firefox:6408): Gtk-CRITICAL **: gtk_text_layout_get_cursor_locations: assertion `layout != NULL' failed
(firefox:6408): Gdk-CRITICAL **: gdk_window_invalidate_rect: assertion `window != NULL' failed
(firefox:6408): Gdk-CRITICAL **: gdk_window_invalidate_rect: assertion `window != NULL' failed
(firefox:6408): Gtk-CRITICAL **: gtk_text_buffer_get_insert: assertion `GTK_IS_TEXT_BUFFER (buffer)' failed
(firefox:6408): Gtk-CRITICAL **: gtk_text_buffer_get_iter_at_mark: assertion `GTK_IS_TEXT_MARK (mark)' failed
(firefox:6408): Gtk-CRITICAL **: _gtk_text_layout_get_block_cursor: assertion `layout != NULL' failed
(firefox:6408): Gtk-CRITICAL **: gtk_text_layout_get_cursor_locations: assertion `layout != NULL' failed
(firefox:6408): Gdk-CRITICAL **: gdk_window_invalidate_rect: assertion `window != NULL' failed
(firefox:6408): Gdk-CRITICAL **: gdk_window_invalidate_rect: assertion `window != NULL' failed