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Disable Automatic Virus Scanning for Firefox Downloads

Firefox when it has finished downloading a file automatically it will scan it using a basic in-built engine. This is very slow and usually redundant as most people have a real time antivirus solution. This guide shows you how to disable it.

Disable Antivirus Scanning

  • Open Firefox and in the address bar type about:config
  • Then confirm you won’t break anything
firefox about:config
  • next type in browser.download.manager.scanWhenDone
  • Double click the setting to change it to false
firefox change settings