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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.
It's a real resource hog on my PC that I've had to uninstall and reinstall several times when it breaks, and it doesn't give you options for which directory you have to install it.
Look at this shit, all for some lights and buttons?
In fairness you can offload profiles to your mouse or whatever and just kill the software. Mouse works fine afterward but without the fancy, awful, per application button mapping. That was always a slow and buggy feature.
Does it offload the LED light settings as well? Because the default drives me nuts.
You can disable or set static lights in the onboard profile. How? It’s confusing and I don’t remember. Very dark pattern but probably not on purpose. Just bad design.
Sweet, I'll research it because it would sure be nice to delete the app