Most words of Arabic origin came into French via another Romance language.
Many of the words that entered Italian came via Sicilian, as Sicily was under Muslim rule for more than two centuries.
A few words, most of them slang terms, came via the North African Arabic dialects of former French colonies.
Meanwhile, Muslim rule in Iberia continued for seven centuries in some areas.
Hence there are many more (Castilian, Catalan and Portuguese) words that derive from Arabic; of these, some have in turn been borrowed by French.