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Lock proxy settings (over default and addons)



I'm locking our proxy settings to our users with Autoconfig and this settings:

lockPref("network.proxy.type", 2); lockPref("network.proxy.autoconfig_url", "http://example.intranet/proxy.pac");

That locks the proxy configuration in a standard Firefox installation, but it's easy to bypass using addons like FoxyProxy (there are much addons like that). How can I secure lock the proxy configuration?


Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.5 r502
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.01
  • IE Tab 2 Plug-in for Mozilla/Firefox
  • Google Update
  • Google Talk Plugin Video Accelerator version:
  • Version
  • Next Generation Java Plug-in 1.6.0_31 for Mozilla browsers
  • 5.1.10411.0


  • User Agent: Mozilla/5.0 (Windows NT 6.1; rv:19.0) Gecko/20100101 Firefox/19.0

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Question owner

Nobody? :(