The rights of firefighters and emergency medical technicians as set forth in this chapter shall not be construed to diminish the rights and privileges of firefighters or emergency medical technicians that are guaranteed to all citizens by the Constitution and laws of the United States and the Commonwealth or limit the granting of broader rights by other law, ordinance or rule. This section shall not abridge or expand the rights of firefighters or emergency medical technicians to bring civil suits for injuries suffered in the course of their employment as recognized by the courts, nor is it designed to abrogate any common law or statutory limitation on the rights of recovery.