Yeah, that was my immediate thought as well. I have a WQHD (3440x1440) main display with two old 1680x1050 panels mounted side by side above it. Even amongst

Yeah, that was my immediate thought as well. I have a WQHD (3440x1440) main display with two old 1680x1050 panels mounted side by side above it. Even amongst those with three monitors my setup is quite unusual and thus would be incredibly useful as a fingerprint. I see that it'll be gated behind a permission popup like many other modern browser features, but based on the number of clients I've had to clear ad networks out of their "Allow Notifications" lists for it's quite clear that a lot of people just hit "yes" to whatever they're prompted about. I of course see the value to developers of complex web apps, but IMO this is the sort of thing that shouldn't actually happen in the browser itself. Make it exclusive to Electron or similar platforms that use a web browser style engine but can have additional capabilities beyond what's reasonable to expose to a plain old browser.