Turn off Firefox download scan
This articles explains the steps to turn off scanning of downloads by Firefox
You can turn off the Firefox request for the downloaded file to be scanned.

Type about:config into the location bar and press enter.

Accept the warning message that appears, this will then bring up a list of preferences.

In the filter box type scan

Double-click on the

browser.download.manager.scanWhenDone

preference to change its value to false

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