snuffyridgewood - Good question! Based on the composition of Febreze air effects it’s unlikely to produce the sought after high. The solvents in Febreze are ethanol and some perfume ingredients are present in relative low concentrations.
Having said that, inhaling any product remains a dangerous activity, even if the desired high is not obtained. Inhalant abuse can lead to a variety of adverse health effects. Therefore, you are right to be concerned about this practice and to seek help if you suspect someone you know is indulging in this dangerous activity.