Or a particular browser. Or a specific operating system. Or the wrong brand of device.

You can probably see where I'm going with that, but in case it's not perfectly clear, I'm trying to say that a company might want to dictate a lot more than just what extension you're using in a browser. Not everyone is going to agree that they are right to do that.

Bear in mind that there's more to consider here than the legality of what they're doing. The openness of the Internet, the interoperability of different operating systems and devices over a particular somewhat-standardized protocol -- these aspects aren't regulated by a law, but they're still important. I'm one of those people who remember the Browser Wars and I don't remember them fondly.

Of course, it's not just about technical aspects, either. There's the whole grey area of whether it's okay for LinkedIn to metaphorically rifle through our proverbial pockets, looking for stuff they don't like and don't want to admit on their virtual premises.

So no, I wouldn't agree that things are as clear cut as you present them.