The documentation seems to state that there are four options for the "display" property within a manifest.json: fullscreen, standalone, minimal-ui and browser
I decided upon 'browser' for one of my apps, but the message from Chrome (Version 76) says "Manifest 'display' property must be one of 'standalone', 'fullscreen' or 'minimal-ui'". The message also appears if I leave 'display' undefined.
Is 'browser' an obsolete option or has it just not made it into the latest Chrome version yet?
(I probably should mention that the message appears in Chrome DevTools>application>manifest).