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Downloading the latest update introduced a virus.

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After downloading the latest update (115.16.0esr 64bit), my antivirus program detected XUL OSX/MSShellcode.ext and quarantined it. What do I do now?

After downloading the latest update (115.16.0esr 64bit), my antivirus program detected XUL OSX/MSShellcode.ext and quarantined it. What do I do now?

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Huh and this is on macOS and not Windows?

After a new Release or update for Firefox some antivirus clients can have false posties until they get definitions update though usually this has been on Windows and not so much on Linux or macOS.

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