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Can Internet Explorer 9 (medium security) log my Firefox browsing history (Private browsing)



If I am logged into an account in IE 9 (medium security) and I subsequently log into Firefox (private browsing) can cookies on IE 9 log my Firefox browsing history?

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  • Next Generation Java Plug-in 10.10.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.01
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  • Intel web components updater - Installs and updates the Intel web components
  • Intel web components for Intel® Identity Protection Technology
  • 4.0.50401.0


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

More Information

Tyler Downer
  • Administrator
  • Moderator
1164 solutions 6629 answers

No, IE doesn't track Firefox's browsing history. Private Browsing can still be tracked by content filters on your computer, your ISP, etc.

  • Top 10 Contributor
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10738 solutions 96600 answers

Helpful Reply

Note that plugins can still create cookies on your computer and MS plugins like the Windows Media Player and Silverlight use the IE cookies and IE temporary internet folder.
I don't know if the WMP and Silverlight plugin obeys the Firefox Private Browsing mode and keeps all data in memory (I'm on Linux).