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I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

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I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

When I try to go to or close almost every web site. The message appears at least twice. This has happened since I upgrade to 6.0.1 (which I did as my previous version was crashing every 30 seconds or so!) While I can still do what I need to this is most time consuming and annoying. Anyone have an idea?

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All Star Contributor

Re: I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

It might be McAfee Site Advisor. https://community.mcafee.com/message/203466

6 REPLIES
All Star Contributor

Re: I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

Download Firefox 6.0.1 (the entire version), then see if uninstalling Firefox, removing the Firefox program directory, and then installing the new version just downloaded fixes it. If the upgrade was done by an update, something might have gone wrong with it.

New Contributor

Re: I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

how do I remove the pgm directory and will this mean all my bookmarks etc. will be gone? OK- just went for it, and it seems to have resolved the issue (and my profile is intact). Thanks!

New Contributor

Re: I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

Guess I spoke too soon. The error message is back with a vengeance. Any other ideas out there. This is driving me nuts (and away from Mozilla).

All Star Contributor

Re: I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

It might be McAfee Site Advisor. https://community.mcafee.com/message/203466

New Contributor

Re: I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

Why you should I have to disable McCafee Site Advisor I pay for this as part of my package and I never had this problem all the time I was using Flock. For me Firefox is a nightmare as it crashes at least once a day and have problems with opening some Adobe documents. I am waiting for an updates that resolves all these issues.

Support Forum Moderator

Re: I continually get this error message "Exc in ev handl: Error: Bad NPObject as private data!"

Hi KevanWebb,

If you have a problem with crashes and McAfee Site advisor I suggest you start your own thread about your own problems. You may find an answer.

Please ask your own question by following the links and prompts from