This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Starting Firefox, this message appears (I have a screen shot available) Java Script Application Exc in ev handl: TypeError: this.o.root.enable is not a function

  • 3 odgovori
  • 122 ima ovaj problem
  • 2 views
  • Posljednji odgovor poslao cor-el

more options

26 Sept. 2011 I get the dialog box mentioned in the Question when I click to open Firefox. I click OK button in dialog box and Firefox opens/launches. I installed Java around the same time I installed Firefox. I installed Firefox and Java within the last seven days. I have a screen shot of the dialog box.

26 Sept. 2011 I get the dialog box mentioned in the Question when I click to open Firefox. I click OK button in dialog box and Firefox opens/launches. I installed Java around the same time I installed Firefox. I installed Firefox and Java within the last seven days. I have a screen shot of the dialog box.

Izabrano rješenje

This issue can be caused by the McAfee Site Advisor extension


Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

Pročitajte ovaj odgovor sa objašnjenjem 👍 2

All Replies (3)

more options

Odabrano rješenje

This issue can be caused by the McAfee Site Advisor extension


Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

more options

Firstly I disabled McAfee SiteAdvisor extension found in Extensions in the Add-ons tab. This was a solution to the issue. Problem solved!

Next, I disabled the McAfee ScriptScan for Firefox 14.4.0 as well. Just for the heck of it.

Thank you for the help!