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my plugin check takes me to wrong page "https://www.mozilla.com/en/404", FF12. How do I fix it ?


XP64 latest updates

Additional System Details

This started when...


Installed Plug-ins

  • Next Generation Java Plug-in 1.6.0_32 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Shockwave Flash 11.2 r202
  • Foxit Reader Plug-In For Firefox and Netscape
  • 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
  • Office Plugin for Netscape Navigator


  • User Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0

More Information

  • Moderator
1041 solutions 8840 answers

Helpful Reply

The problem is on the Mozilla servers, in particular how it handles redirects. Mozilla are aware of the issue and should fix it soon.

Pending this, you can use this link to go to the plugin check page - https://www.mozilla.org/en-US/plugincheck/

Question owner


My Wife's laptop works correctly though. Why is that ?

  • Top 25 Contributor
  • Moderator
437 solutions 3156 answers

This has been fixed on Mozilla's side in Bug# 752232

It tries to use https://www.mozilla.com/plugincheck/ and then gave a error instead when redirecting to https://www.mozilla.org/plugincheck/

Many Mozilla pages that were on mozilla.com have since been either changed to or is being redirected to mozilla.org and sometimes issues have arisen.

Modified by James