I've starting investigating this issue. The most obvious thing to notice is that the icedtea6-plugin doesn't create the named pipes in ~/icedteaplugin/ as it should.
That would explain the subsequent failure of the assertion for the gio write 'channel != NULL'. Obviously the channel is NULL and is presumably the pipe firefox should be writing to to communicate back to the plugin.
I've starting investigating this issue. The most obvious thing to notice is that the icedtea6-plugin doesn't create the named pipes in ~/icedteaplugin/ as it should.
That would explain the subsequent failure of the assertion for the gio write 'channel != NULL'. Obviously the channel is NULL and is presumably the pipe firefox should be writing to to communicate back to the plugin.