Frontend developers can benefit from using an Internal Developer Platform (IDP) by gaining self-service capabilities that enable them to operate apps on their own without relying on others, thereby increasing productivity and reducing manual work. IDPs provide full visibility into how applications run, allowing developers to understand the interplay between application layer and infrastructure, leading to better code quality and reduced complexity in setup. With an IDP, frontend developers can perform tasks such as adding environment variables, spinning up new environments, and rolling back changes with ease, streamlining their workflows and improving overall developer experience.