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TypeError: elem.hasAttribute is not a function


everytime I open up a site this error message appears; it's closed and reappears with an option to not have it appear again which is checked and the message closed. It then does not appear again until I go to another site when the same thing happens.

I've used Firefox for years w/o any problem up to now.

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.6 r602
  • Next Generation Java Plug-in 10.17.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • iTunes Detector Plug-in
  • Google Update
  • npsitesafety
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.6
  • 5.1.20125.0
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.5
  • McAfee MSC FF plugin DLL
  • Gaaiho Doc Plugin
  • Dragon NaturallySpeaking Rich Internet Application Support - Plugin
  • SiteAdvisor
  • Motive Plugin for Mozilla Browsers
  • 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:19.0) Gecko/20100101 Firefox/19.0

More Information

  • Top 10 Contributor
2365 solutions 20922 answers

If you get this on multiple sites that are not all part of the same network, it could indicate that one of your add-ons is not fully compatible with Firefox 19. Could you check for updates here:

orange Firefox button (or Tools menu) > Add-ons > "gear icon" > Check for Updates

If no updates are found, or the problem continues, try disabling all nonessential and unrecognized add-ons on these tabs:

orange Firefox button (or Tools menu) > Add-ons > Plugins category
orange Firefox button (or Tools menu) > Add-ons > Appearance category
orange Firefox button (or Tools menu) > Add-ons > Extensions category

You can save the step of restarting Firefox until you've worked your way through all 3 lists.

Any change?

  • Top 10 Contributor
  • Moderator
10751 solutions 96758 answers

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