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I am getting a warning: "someone is trying to deceive firefox to get an update that is a security threat


This warning ends with: 'please contact your network supplier and ask him for help

Modified by tyui

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.5 r502
  • Adobe PDF Plug-In For Firefox and Netscape "9.5.3"
  • 5.1.10411.0
  • IE Tab 2 Plug-in for Mozilla/Firefox
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • np-mswmp
  • Express View Browser Plugin


  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0

More Information

Tyler Downer
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1164 solutions 6629 answers

Please create a screenshot of the problem you're seeing by following the guide mentioned at How do I create a screenshot of my problem?.

Once you've done this, attach the saved screenshot file to your forum post by clicking the Browse... button below the Post your reply box. This will help us to visualize the problem.

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10738 solutions 96600 answers


  • [/questions/919214] "Something is trying to trick Firefox into accepting an insecure update.

Question owner

the message I am getting is in Hebrew so I don't know if it helps but here it is

Question owner

thank's cor-el I do not know which value I can change the app.update.certs.1.issuerName into

this is a home computer 

anyway the value I have now is: OU=Equifax Secure Certificate Authority,O=Equifax,C=US