Simplify development with public ports in Firebase Studio

Firebase Studio’s public ports feature lets developers expose backend services and web application previews through public URLs while a workspace is active, simplifying full-stack integration, testing, and feedback sharing. Developers can make a running backend port public from the Firebase Studio tab by changing its lock icon to a globe, allowing frontend applications such as React clients to call APIs such as Node.js Express services without changing their deployment setup. Public preview access can similarly be enabled through the web preview toolbar for quick sharing, though it is not intended for production because access ends when the underlying virtual machine stops, typically after a few hours. The example implementation uses an Express server with CORS enabled and a simple HTML frontend that fetches data from the backend’s public URL, illustrating cross-origin communication between separately hosted frontend and backend components.

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