Hi Whilst we provide a number of default search providers in Focus for Android, a number of them have features that will not quite work as expected in a private browser where the history and cache is due to be removed. I do not think there is much that can be done about this at the moment, but I know that the team behind Focus for Android are looking into some new features, so perhaps this could change in the future. Really glad you enjoy using Focus for Android, watch out for good things coming to that and Firefox very soon.