Napalm Cannon is a Datanet intel report seen in F.E.A.R. 2: Project Origin.

The Napalm Cannon report.
It appears on Michael Becket's PDA when he first finds the Balzer LM10 Napalm Cannon, and details the specs of that weapon.
Transcript[]
THE BALZER LM10 FIRES BURSTS OF IGNITED NAPALM, MAKING IT EXTREMELY USEFUL IN SITUATIONS WHERE INDISCRIMINATE FIREPOWER MUST BE BROUGHT TO BEAR ON MULTIPLE HOSTILES. COLLATERAL DAMAGE WHEN USING THIS WEAPON IS UNAVOIDABLE. A SUPERIOR WEAPON FOR CLOSE-IN ENGAGEMENTS, THOUGH CARE MUST BE TAKEN TO AVOID OPERATOR INJURY.