Exc in ev handl: Error: Bad NPObject as private data!Why do I get this? and how do I get rid of it. I am a senior gal who needs easy help. Thank you.

It just occurs when it wants to.

This was the answer. Thank you so much for the easy to follow instruction you left for me.

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    This issue can be caused by the McAfee Site Advisor extension
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    This issue is caused by the McAfee Site Advisor extension
    *https://community.mcafee.com/message/203466
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    * https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes

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