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.

Avatar for Username

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

Wannan tattunawa ta zama daɗaɗɗiya. Yi sabuwar tambaya idan ka na bukatar taimako.

Everytime I click on a tab or link a Java Script Application box pops up saying "Exc in ec handl: Error: Bad NPObject as private data!" How can I fix this? Thank you

  • 1 amsa
  • 1 yana da wannan matsala
  • 1 view
  • Amsa ta ƙarshe daga cor-el

ldmyroni
ldmyroni
more options

Everytime I click on a link or tab the Java box pops up or it opens a new window for me.

Everytime I click on a link or tab the Java box pops up or it opens a new window for me.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

That 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 or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).