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We study the formation of quantum droplets in the mixture of a single-component Bose-Einstein condensate (BEC),and a two-species Fermi superfluid across a wide Feshbach resonance.With repulsive boson-boson and attractive boson-fermion interactions,we show that quantum droplets can be stabilized by attractive fermionfermion interactions on the Bardeen-Cooper-Schrieffer (BCS) side of the resonance,and can also exist in the deep BEC regime under weak boson-fermion interactions.We map out the phase diagram for stable droplets with respect to the boson-boson and boson-fermion interactions,and discuss the role of different types of quantum fluctuations in the relevant regions of the BCS-BEC crossover.Our work reveals the impact of fermion pairing on the formation of quantum droplets in Bose-Fermi mixtures,and provides a useful guide for future experiments.