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The add-on window keeps automatically popping up every time I start Firefox. How do I stop this?


Every time I start Firefox, I get an add-on window with current updates. I don't want this to happen . It just started within the last week or so.

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Installed Plug-ins

  • Office Plugin for Netscape Navigator
  • np-mswmp
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Default Plug-in
  • Java(TM) Platform SE binary
  • MasteryNet Course Player for Mozilla (NPAPI) v2.506
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  • GEPlugin
  • Picasa plugin
  • 4.0.60310.0
  • Google Update
  • Java Plug-in 1.6.0_12 for Netscape Navigator (DLL Helper)


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20101203 Firefox/3.6.13

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  • Top 10 Contributor
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10738 solutions 96600 answers


This can also be a problem with the file(s) that store the extensions registry.

Delete the files extensions.* (extensions.sqlite, extensions.rdf, extensions.cache, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry. New files will be created when required.

See "Corrupt extension files": http://kb.mozillazine.org/Unable_to_install_themes_or_extensions

If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the "Find Updates" button (Firefox 4: click the Tools button at the left side of the Search Bar) to do a compatibility check.