Players that have at least one other level 99 skill aside from firemaking will have a yellow trim around the edges of the cape. If 99 firemaking is the only level 99, the cape and its edges will be the same orange color.
When buying the cape, players also get a Firemaking hood which matches the cape but gives no stat bonuses.
Like all capes of accomplishment, the firemaking cape has a unique emote and can be operated while worn which will result in the players firemaking level temporarily raising to level 100.
A player performing the Firemaking cape emote in-game.