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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.
Ok well as a Linux user I don't get any of this. I connect to the keyboard with Bluetooth and it just works when you plug it in. There are no pop-ups or alerts to go to any web pages.
Just saying life is quite a bit better here in that regard.
I have a Logitech K380 that for some goddamned reason by default requires Fn keys pressed to use function keys normally. On Win and MacOS their software can be used to turn it off. On Linux it's a bunch of scripts that sometimes work and sometimes don't.
I have a keyboard with the same anti feature. It is beyond stupid. I used to like Logitech stuff, since 2016 or so when I got that keyboard I've hated them. I've had a couple other of their devices since then, and they always come with some bullshit that require their special software or a special account to disable.
I fuckin hate Logitech now.