A ‘mozcmd’ directory is an easy way to create new custom commands. For more information see https://developer.mozilla.org/docs/Tools/GCLI/Customization
Mae cyfarwyddiadur 'mozcmd' yn ffordd hawdd i greu gorchymyn cyfaddas. Am ragor o wybodaeth gw. https://developer.mozilla.org/docs/Tools/GCLI/Customization