Are you using the latest version of CPF (18.104.22.168)?
Had you previously been using IE prior to opening firefox or opened firefox while IE was open?
If you had earlier used IE, closed it and then opened firefox then CPF would generate the warning you got. This is part of the way CPF works (though it is still not quite perfected) and it is why CPF passes all those leak tests mentioned elsewhere on the forums.
These OLE Automation warnings have confused lots of new users.
If you recognize the applications as trusted programs then you may safely allow the alert. Moreover, by checking the Remember option (if there is one) you should not be bothered by the alert in the future.
There are many mentions of this on the forums and below are a few of the many topics:
To me, it has been perfected since v2.4 because I have yet to see one OLE automation alert :).
The basic thing to remember is if you recognize both programs as trusted you can safely allow the alerts, otherwise you risk losing net connection and may have to restart your browser.
I have had an alert similar to soulman’s when I first installed the latest version on one pc. I manually uninstalled 2.3 and installed 2.4 on this pc. Once I ticked to remember the rule and it appeared on my application control rules all was well.
On another pc where the firewall was updated to V2.4 automatically I have had no OLE alerts - the rules I had already created in the previous version appear to have been carried over to the updated 2.4.
I don’t know if this is normal but everything seems to work fine on both pc’s now.