Well, according to Windows Report , the Chromium Gerrit a code review system for Chromium projects now has an entry labeled [Vertical Tabs] add feature flag. Then there's the [Vertical Tabs] Add a TabsMetricProvider to log VerticalTabs state in this commit . That commit reads, This metrics provider is used for metrics filtering. For right now this metric is just logging the feature state, however it will in the future log whether the vertical tabstrip is being rendered. Also: 7...
