Anyone with information is asked to call Police Scotland on 101 quoting reference number 0246 of 23 February or phone Crimestoppers anonymously on 0800 555 111.
Detective Constable Andrew Baldacci, of Clydebank CID, said: “I’m appealing for anyone who has information about this man, or the man himself, to come forward.
Police are treating the fire as “wilful” and are appealing for information about the incident in the West Dunbartonshire town.
“I’d also ask anyone who saw what happened or has any information about the incident, and has not already spoken to police, to contact us.
The blaze set off the fireworks which exploded, sending rockets shooting into the night sky above Braes Avenue in Clydebank at around 1am on Sunday.
