1. apt-get purge moonlight-plugin-core moonlight-plugin-mozilla 2. Start firefox 3. Exit firefox 4. apt-get install moonlight-plugin-core moonlight-plugin-mozilla 5. Start firefox fixes the problem for me.
1. apt-get purge moonlight- plugin- core moonlight- plugin- mozilla plugin- core moonlight- plugin- mozilla
2. Start firefox
3. Exit firefox
4. apt-get install moonlight-
5. Start firefox fixes the problem for me.