Support for enablePrivilege has been removed in Firefox (Bug 546848), so it is no longer possible to get special elevated privileges by using this method. *Bug 546848 - Remove support for enablePrivilege If a web page is using this then they will have to use other ways get what they want like providing a Firefox extension. This issue can also be caused by an extension that isn't working properly and that tries to inject code on a web page. Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance). *Do not click the Reset button on the Safe mode start window or otherwise make changes. *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

I started firefox in a new window and did not get the error message . Thanks