I know Safari is, but do Firefox and Opera support quarantine on downloaded files?
https://support.apple.com/en-us/HT201940
Especially this function:
Mac OS X Snow Leopard v10.6 and later also check for known instances of "malware", or malicious software. When you open a quarantined file, OS X checks to see if it includes known malware. If so, an alert message similar to the following appears:
https://support.apple.com/en-us/HT201940
Especially this function:
Mac OS X Snow Leopard v10.6 and later also check for known instances of "malware", or malicious software. When you open a quarantined file, OS X checks to see if it includes known malware. If so, an alert message similar to the following appears:
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