
Error message pops up switching tabs. What would cause a tab to flash out to a new window?
When switching tabs I get a popup box with. Exc in ev handl: Error: Bad NPObject as private data!
I am trying to figure out if was the last firefox update or the last McAfee update?
Wšykne wótegrona (1)
This issue can be caused by the McAfee Site Advisor extension
Start Firefox in Use Troubleshoot Mode in Firefox to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode