Problem with Bitdefender IS and Firefox


Bitdefender IS will not load Firefox.  I have read that it is something to do with Certification but I am not very IT savvy so unable to resolve  the problem.  I have tried uninstalling BDIS and reinstalling and it works for a while than get the message 'Bitdefender needs to close Firefox and Opera browsers..... '   and when I click OK the problem is back again.  My subscription is shortly expiring and I find this problem so frustrating that I probably look for another alternative.