macOS launchpad icons became blurry

macOS launchpad icons became blurry as compared to those in the dock. See System Preferences for example. Resolution has become really low. I don't why. What could be the reason for the same?

Example image Example on external 1080p monitor


Solution 1:

It fixed by itself -_-Img

I dunno how and why... UPDATE: The problem is in mozilla firefox, while it opened in any desktop it creates this bug somehow :/ ?!