Roku OS 15.1 Brightens Dev Tools and Playback Precision
Roku’s OS 15.1 update rolls out with a new HLS manifest-based seeking mode (EXT-X-START) for exact video starts, adds Perfetto tracing for app debugging via External Control Protocol and WebSocket, and deprecates roString.AppendString in favor of SetString, aiming to improve playback precision and developer workflow; initial rollout started after beta testing.