Closes #2379.

• At least two implementers are interested (and none opposed):
  • Chrome and Safari implement clientInformation
  • Everyone has the same painful non-interop for Navigator lifetime as they do for Location, as discovered in Define when navigator and location objects are replaced #2545. I specced something reasonable that matches nobody for now.
• Tests are written and can be reviewed and commented upon at:
  • Test window.clientInformation web-platform-tests/wpt#29126
• Implementation bugs are filed:
  • Chrome: N/A
  • Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1717072
  • Safari: N/A

(See WHATWG Working Mode: Changes for more details.)

/system-state.html ( diff )
/window-object.html ( diff )