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how to remove the ThePluginProblem dynamic plugin checker


In early October 2012, Mozilla.org rolled out / pushed out a piece of code that forces Firefox (all versions) to go to www.mozilla.org/en-US/plugincheck every time you restart the computer and re-open Firefox. The unauthorized intrusion is an issue. The constant nagging is unacceptable. Their attempts to recruit other web pages to join in the intrusion and nagging is inexcusable. Short of uninstalling Firefox after 20+ years, how do we get rid of the 'new' plugin checker?

Additional System Details

This happened

Every time Firefox opened

This started when...

Early October 2012

Installed Plug-ins

  • np-mswmp
  • Adobe PDF Plug-In For Firefox and Netscape "9.5.0"
  • Default Plug-in
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Shockwave Flash 11.4 r402
  • Adobe Shockwave for Director Netscape plug-in, version
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 10.7.2 for Mozilla browsers
  • 5.1.10411.0
  • Classic Java Plug-in 10.7.2 for Netscape and Mozilla


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20120216 Firefox/3.6.27 GTB7.1

More Information

  • Top 25 Contributor
  • Moderator
622 solutions 8020 answers

My firefox versions do not go to plugincheck every time I restart the computer, but then I only have one copy of Firefox 3.6 installed and do not normally use that. Firefox 3.6 is unsupported the last version of that would be v.3.6.28, released March 13th, 2012 http://www.mozilla.org/en-US/firefox/3.6.28/releasenotes/

Keeping plugins up-to-date is good for security. (Although Flash Player >= 11.3 may have issues with Firefox on Windows >= Vista ) It is also good to use up-to-date Firefox Releases.

  • Top 10 Contributor
  • Moderator
10754 solutions 96776 answers

You may have plugins installed that have a blocked status.
You can check for such plugins (Tools > Add-ons > Plugins) and remove (uninstall) those plugins to see if that helps.
You may have to check the plugins.dat file to find the location.

Question owner


After posting to this forum a miracle has occurred. The unauthorized intrusions and nagging have suddenly stopped. Thank you!

Firefox has for decades sought it's place in the market by emphasizing that the computer user is the one who makes the choices, that Firefox gives the user choices, as opposed to a certain competitor that takes your choices away and forces their preferences on the user. Hmmmm, was Firefox temporarily invaded by the competitor? Thank you Firefox for remembering your roots, and your promises to the computer users who have provided your market share.

PS- neither of the replies have any bearing on the situation as described. And while everyone is entitled to an opinion, opinions do not resolve software performance issues.

grumpyolman 0 solutions 16 answers

[Personal attack removed by moderator. Please read Forum rules and guidelines, thanks.]

Modified by Chris Ilias

pc-not 0 solutions 1 answers

I need to turn this thing off also, it is causing my brouser to hang and or crash on startup.

it is annoying, its nagging simply increases my resistance to it.

I have been using firefox since early xp.

if i cant get rid of it, I shall have to get rid of firefox.


  • Top 25 Contributor
  • Moderator
622 solutions 8020 answers

Running a plugincheck should not cause Firefox to hang or crash.

You would have been better starting a new thread and asking your own question using /questions/new.
(If you ask a new question mention it in this thread and I will look for it)

I hope you are not using an old unsupported version of Firefox, it should be on version 16 by now.

Modified by John99

Helpful Reply

The crashes and hangups started with the push out of the new forced plugin update checker. The point is that the plugin checker is causing the instabilities. The goal is to remove the plugin checker that no one wanted or asked for, but was forced on us. The Firefox team is not willing to admit they screwed up by dictating to everyone. They will not undo the damage they have created. And so Firefox will be losing customer loyalty and trust, not to mention market share as we jump ship on this piece of marxist programming.

And older versions of Firefox are not "unsafe". They merely lack the undesired functionality of the newer versions. Browser safety is addressed by the computer owner in other ways. Firefox should never be dictatorial in how the computer owner determines to address computer safety.