What if I'm deliberately showing a comparison of compression artifacts, or a screenshot of bad vs good game textures, or comparing photos of different cameras? Now the browser will alter the intended good vs bad quality comparison.
The feature as such seems okay, and I can even see myself using this on occasion. But it really should be a button in the image or something, for usability and privacy concerns.
Would love to be able to stream 360p video and have 1080p equivalent quality, for when I'm just absently listening to what's happening.
But sending a picture to the cloud, to get a bigger picture in exchange, that sounds stupid.