This paper offers an in-depth analysis of the role of the Internet of Things (IoT) in fire safety systems, emphasizing fire detection, localization, and evac- uation. Through a bibliometric analysis, we identify pivotal research trends and advancements in IoT-based sensors and devices. We discuss the integration of emerging technologies to enhance fire safety system performance and delve into the primary network architectures and communication protocols vital for efficient IoT-based fire safety systems. The paper concludes by highlighting challenges, research gaps, and prospective directions for IoT in fire safety.