"How can I cure/stop this error message at startup ' Exc in ev handl: TypeError: this.oRoot.enable is not a function"

When you start Firefox 8.0, I get the above Application JavaScript error. When I click on "OK" in the dialog, Firefox seems to start normally.

What could be the cause and how can I cure?

This problem may be caused by the extension of McAfee Site Advisor

Launch Firefox in Mode safe mode to check if one of the extensions of the origin of the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > appearance/themes).

   Don't make any changes on the Safe mode start window.

Tags: Firefox

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