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Am getting message saying something is trying to upload unsecure update for Firefox. Have scanned system with Avast but no reported problems

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  • Last reply by cor-el

andiowens
andiowens
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During a browsing session looking for spares for garden machinery I got a message saying something was trying to upload an unsecure update to Firefox. Have scanned system with Avast and a couple of other malware programs but have no reported threats. As far as I am aware my browser is fully up to date.

During a browsing session looking for spares for garden machinery I got a message saying something was trying to upload an unsecure update to Firefox. Have scanned system with Avast and a couple of other malware programs but have no reported threats. As far as I am aware my browser is fully up to date.

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cor-el
cor-el
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  • Top 10 Contributor
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This issue can be caused by the presence of leftover files in the Firefox program folder (defaults\pref) like a file firefox.js that overrides the update URL with a wrong link.
Do a clean reinstall and be sure to remove the Firefox program folder.

See also:

Download a fresh Firefox copy and save the file to the desktop.

  • Uninstall your current Firefox version.
  • Do not remove personal data when you uninstall the current version.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.

Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.