Fairfield Fire Department reports a passing firefighter heard a residential smoke alarm at 4:37 p.m. Thursday in the 300 block of West Briggs Avenue, smelled smoke at a window and knocked on entrance door. No one answered, two firemen made entry, occupant was not home. A pan had been left on the stove, contents were burning. Firefighters removed pan to sink, filled it with water and notified a neighbor. Fire chief will attempt to contact occupant later.