Napalm was dropped the French in Indochina from Corsairs and Bearcats.
They used to this purpose the "bidons speciaux" SECAN 63 (450 liters) and the smaller SIC 100 (based on original Bearcat fuel tanks, that soon became a rarity in Indochina, in spite of the efforts to look and find them on the the ground and re-use them) , as well napalm canisters originally based upon F-80 US drop tanks (the "750lb, 110gal US fire bomb E74" that evolved into the later 750lb M-116 firebomb. the standard US Napalm bomb of the mid/late fifties and the750lb Mk77 Mod 0 firebomb of the early sixties).
The so-called improvised napalm bombs based on P-51 fuel tanks (in fact the forerunners of the 110 gal US 750lb Mk78 Firebomb)
Their dimensions did not enable them to be carried under the P-63 (they were too long).
To make things more complicated, some Bearcats were seen in Indochina, carrying...P-51 drop tanks...leaving the question open whether, indeed, such tanks were only carrying fuel...or napalm. The answer may be in the type of napalm igniter used by the French, that need to be attached on the side of the napalm canister, and, if this was quite simple in canisters with a roughly cylindrical body, on oblong shaped canisters it would have been quite a headache for the armourers. (Don't forget also the huge shortage in drop tanks that plagued the French Bearcats.)
M116
SIC 100 (a battered original Bearcat fuel tank)
Fuel tanks or Mk78 napalm?
and to contradict what I wrote, this pic of a SECAN 63 and of a M116 with the igniter fixed at an unusual position (well, in fact it's not a French igniter, but a US one
)