> Is it possible to gather entropy from weird sources from the user like mouse movements, that person's timezone, OS version and type, language preferences, scr

> Is it possible to gather entropy from weird sources from the user like mouse movements, that person's timezone, OS version and type, language preferences, screen resolution, browser fingerprint etc? User mouse movements, maybe. But only while it's moving. A person's timezone, OS version and type, language preferences, screen resolution, browser fingerprint etc... those don't change so often. So they're not really good sources of entropy.