This is the problem with jumping to conclusions from a vague excerpt. The vendor is some random anti-virus vendor and if you know what trying to get a handle there means....

> More of a concern was user reports that some antivirus software was flagging all our Universal Binaries as malware, and corrupting the Firefox installation the moment the update arrived.

> The software was using machine learning techniques and presumably observed that our combined Universal Binaries didn’t quite look like any other legitimate software it had ever seen before.

> Attempts to contact the vendor through regular support channels were unsuccessful so we ended up searching LinkedIn and managed to find an engineer working on the core antivirus detection.