The official website and social media pages of the Fire Force anime confirmed that the 3rd season is in the works.

Apart from that, a mobile game was also announced. The name of the mobile game is “Fire Force: Enbu no Sho (Flame Dance)“. Mrs. Green Apple will be in-charge of the opening theme of the game titled “Enen”.

In regards with the announcement of the 3rd season, additional details will be announced on their website and social media pages of Fire Force anime.

Fire Force is a Japanese manga series written and illustrated by Atsushi Ohkubo. It was serialized inx Kodansha’s Weekly Shōnen Magazine from September 2015 to February 2022.

An anime television series adaptation by David Production aired from July to December 2019. A second season aired from July to December 2020. A third season has been announced. The anime television series is available for streaming on Crunchyroll, Netflix and Bilibili.

Synopsis:
Tokyo is burning, and citizens are mysteriously suffering from spontaneous human combustion all throughout the city! Responsible for snuffing out this inferno is the Fire Force, and Shinra is ready to join their fight. Now, as part of Company 8, he’ll use his devil’s footprints to help keep the city from turning to ash! But his past and a burning secret behind the scenes could set everything ablaze.

Synopsis taken from Crunchyroll website