Tuesday, February 19, 2013

Can’t update or uninstall Firefox

While trying to install Firefox 19 over previous Firefox 17 installation the following issue occurred.



  • When trying to run installationpackage for Firefox 19 message appears showing “Your computer must be restarted to complete a previous upgrade of Firefox. Do you want to reboot now?”
  • When trying to uninstall Firefox 17 same message occurs.

Restarting didn’t make any difference. Same message after 5 restarts.


  • Delete all files in Mozilla Firefox folder ending with –delete
  • Delete file firefox-exe.moz-upgrade in Mozilla Firefox installation folder.
  • Run uninstall again, and then install Firefox 19.



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