I believe that you're correct. I don't know you got DVs. If anyone Now is I have to change Chrome behavior, let me know.

Franck Dernoncourt‭ I downvoted it because I initially considered it more a comment than an answer. It doesn't say how to overcome the issue. As it says, it's a wild guess. It still has merits as an answer, just a very partial one, so reason to downvote instead of flag for NAA.

That said, seeing as it's been confirmed, I believe the question should be streamlined, remove the dependency on MS Paint, and focus it on Chrome. Then the answer should be updated to the remove the bits of speculation, more confidently state the issue, and hopefully suggest one or more workarounds for it.

Andreas demands justice for humanity‭ Thank you. If I remove the mention about Microsoft Paint, then people are going to ask me how do I know that the quality has been reduced.

Any alternative application could suffice; it doesn't have to be MS Paint. Thus, it suffices to mention you attempted pasting it into other applications, without specifying which. Though, that should naturally lead to the conclusion that the problem most definitely lies with Google Chrome feeding the clipboard with a lower resolution image, and not the clipboard or receiving application downsizing it. So that would leave the question asking why Google Chrome does it, and how to work around it. A relevant detail to investigate at that point, is which surfaces/views you are copying the image from.