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by Stratoscope 5206 days ago
> To my knowledge, all desktop browsers ignore this spec and treat each pixel as a pixel.

Not really. Most desktop browsers support pixel scaling with Ctrl+Plus and Ctrl+Minus or user preferences, and they may even remember this setting for each domain.

So not only is a CSS pixel not always a device pixel, but it may be a different (fractional) number of device pixels on different websites.