HLS Recorder for Firefox

This tool records HLS playback sessions from within Firefox, producing a local archive that includes the manifest, media segments, and timing metadata. It is designed for developers, QA engineers, and streaming operators who need detailed, reproducible data about how an HLS stream behaves in a browser environment.
Conceptually, the recorder hooks into the browser's media pipeline to capture the loaded playlist, per-segment durations, timestamps, bandwidth estimates, and any available encryption metadata. It does not affect playback; it only reads and writes local artifacts for analysis.
Core value: provides end-to-end visibility of HLS behavior, supports live and VOD streams, and yields an index.json plus per-segment files that can be replayed or processed by external tools (FFmpeg, player simulators). Use cases include debugging stalls, verifying ABR decisions, and documenting stream characteristics for compliance. Advanced usage includes optional encryption references, bandwidth filtering, and multi-variant manifest support. The artifact bundle enables reproducible tests and performance assessments across environments.