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As if it wasn't bad enough that they want me to use a random internet service to add a keyboard to a usb wifi receiver, they have the balls to put this for Firefox users. I clicked out of pure curiosity, as I'm not even remotely interested in involving a corporate internet service in getting my keyboard connected to my computer. This is the message you get now on Logi Options software if you have a Unifying Receiver: 
For the curious: https://logiwebconnect.com
EDIT: some people on the thread have brought up that the error message being displayed for Firefox users is due to the WebUSB API not being implemented by Firefox due to security concerns. This still does not justify having to use a web app to plug peripherals to a PC.
Yeah I know. My brother in law (and by extention my sister) are super smart and politically active but they have a house full of data sucking gadgets like Alexa and absolutely no concerns about data privacy or security. I've tried to talk to them about being more selective about how they share their data, but my brother in law is a lawyer so trying to persuade him is like going to court and is just exhausting.