This bill amends federal firefighter assistance programs to help firefighters prevent and detect cancer related to their occupational exposure. Specifically, it allows firefighters to use federal grant money to establish cancer prevention programs, including multi-cancer early detection testing and other preventative screenings, with a limit of $1,750 per test per firefighter. The bill authorizes $700 million in funding for these cancer prevention grants. Additionally, it establishes a voluntary research program where firefighters can share their test results with the Centers for Disease Control and Prevention in an anonymized format to identify trends and causes of cancer among firefighting personnel. This legislation recognizes that firefighters face elevated cancer risks due to their exposure to hazardous materials at fire scenes and aims to provide resources for early detection and prevention efforts.