Fix user-select prefix finding in Firefox
Fix user-select prefix finding in Firefox

hemnstill/react-draggable,hemnstill/react-draggable,mzabriskie/react-draggable,hemnstill/react-draggable,STRML/react-draggable,STRML/react-draggable,STRML/react-draggable,mzabriskie/react-draggable,mzabriskie/react-draggable,hemnstill/react-draggable