If Minecraft does not start, make sure your browser uses Sun Java as Java Virtual Machine. In
about:plugins to location field. This lists all plugins. Look for Java-related
MIME types (e.g.
application/x-java-applet, ...). The Description column tells which utility
handles this MIME type. It should be
If Description is
IcedTea, you should uninstall
icedtea6-plugin it as explained above.