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adblock add ons are not working upon update to Firefox 15


I upgraded to Firefox 15 with AdBlock Plus and suddenly I am seeing ads and am not able to block anything or add new subscriptions. I reset Firefox and installed AdBlock Lite, but am still experiencing problems with seeing ads. Two days ago, I was not seeing ads and now I am.

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.4 r402
  • npsitesafety
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • 5.1.10411.0
  • iTunes Detector Plug-in


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20100101 Firefox/15.0

More Information

Nathan2055 11 solutions 110 answers

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try some of the following programs to scan for malware:

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

Question owner

I have AVG 2012 installed on my computer and have run scans and there are no viruses or malware that I am aware of.