Firebase Auth Lite

Firebase Auth Lite (Beta) is a lightweight, performance-focused alternative to the official Firebase Auth SDK, designed specifically for modern browser environments. Currently at version 0.8.9, it aims to deliver significantly smaller bundle sizes and faster authentication performance, claiming to be up to 27 times smaller and 13 times faster than the official SDK. The library is under active development, with its API explicitly stated as subject to change without warning until it reaches a stable 1.0 release. Key differentiators include a simplified API, enhanced client-side security through direct OAuth redirect handling, and limitations such as localStorage-only session persistence. It relies on modern browser features like the Fetch API and localStorage, requiring users to handle transpilation for broader browser compatibility. Its release cadence is ad-hoc, driven by development progress toward v1.0.