Motivations and passions in m-Facebook use

•Perceived enjoyment fuels both passions and directly drives m-Facebook usage.•Perceived usefulness is a moderator of the effect of enjoyment on m-Facebook usage.•Perceived usefulness supports harmonious passion for m-Facebook.•Obsessive passion is a stronger predictor of m-Facebook use than harmonious passion.•Passions are better predictors of m-Facebook usage than motivations.