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I have Firefox 18.0.1 and when I click "Check to see if plugins are up to date", I get an uresponsive script warning.


When I click the link "Check to see if plugins are up to date" at the top of the Add-ons Manager page, it opens a new page like normal. The new page displays everything but the plugins and their status. The page just sits waiting for the status results to populate. If I try to click anything at this point, the page freezes and I see a message at the top of the window that Firefox has become unresponsive. If don't click and wait about 60 seconds, I get a "Warning - Unresponsive Script" message. I also see the following information with this warning: Script: https//www.mozilla.org/js/plugincheck.js:14 This first happened yesterday, after accidentally removing Java from my PC - I think it was Java 6. When I tried to access Java downloads to re-install, I got the same unresponsive script message. So, I had to access Java downloads with IE instead of Firefox, and I re-installed Java (version 11, update 11). Has Java caused my problem? Should I attempt to find Java 6 and install it?

Additional System Details

Installed Plug-ins

  • Next Generation Java Plug-in 10.11.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Google Update
  • Shockwave Flash 11.5 r502
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.5
  • Google Talk Plugin Video Accelerator version:
  • Version
  • 5.1.10411.0
  • CANON iMAGE GATEWAY Album Plugin Utility Module
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/20100101 Firefox/18.0

More Information

I have installed the extension YesScript 1.9 - it didn't help. I restarted Firefox with add-ons disabled and I still got the unresponsive script message. I can disable Java, and I don't get the unresponsive script message - but I still cannot see the status of my plugins.

  • Top 10 Contributor
  • Moderator
2046 solutions 8901 answers

hello eric, does it help when you reset firefox (this will keep your saved bookmarks & passwords)?

Reset Firefox – easily fix most problems