When you install an extension in chrome it's by default set to be disabled in incognito mode (supposedly since some extensions don't respect privacy). From the

When you install an extension in chrome it's by default set to be disabled in incognito mode (supposedly since some extensions don't respect privacy). From the extensions page you can easily set UO, or any other extensions for that matter, to remain enabled in incognito mode windows. Last time I checked chrome does not by itself offer any tracking protection while in incognito mode (supposedly since this would make it easier to detect when a user is in incognito mode). So you probably want UO enabled for that.