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after mozbackup restores "certificates" firefox cannot start, other items restore OK


I use Mozbackup to synchronise Firefox from my desktop to my laptop. My laptop's Firefox would not start and displayed a crash reporting dialog.

I completely uninstalled and made a fresh, new install with Beta 19.0.2. I then restored my Mozbackup from my desktop, item by item. When the "Certificates" item was restored, Firefox would not start and display the crash repoting dialog. So now I know that the certificates item is the culprit.

Why does this allow Firefox to start on my desktop but refuses to do so on my laptop?

Thanks a lot! heskel@usa.net

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Installed Plug-ins

  • Shockwave Flash 11.5 r502
  • VLC media player Web Plugin 2.0.2
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 10.9.2 for Mozilla browsers
  • Google Update
  • Nitro PDF Plug-in for Firefox and Chrome
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • GEPlugin
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin


  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:19.0) Gecko/20100101 Firefox/19.0

More Information

  • Top 10 Contributor
  • Moderator
10755 solutions 96800 answers

Did you try to remove the cert8.db file?

You can use this button to go to the Firefox profile folder:

  • Help > Troubleshooting Information > Profile Directory: Show Folder

Question owner

I used the Mozbackup file from my desktop, which does not seem to have this probem, to restore all my Firefox settings. I restored the settings category by category until I found the culprit by process of elimination. The "Certificates" item from the backup is the one that prevented Firefox from starting. My question is, why this happens?

  • Top 10 Contributor
  • Moderator
10755 solutions 96800 answers

Did you also restore the secmode.db file?