Viewer Overview

QRTuber has two usable viewer paths today: the browser extension and the web viewer. The userscript path is still a spike, not a supported viewer.

Viewer	Status	Best fit	Tradeoffs
Browser extension	Implemented	Watching a supported page directly in the browser	Most integrated; supports popup/options and channel mapping; depends on extension pixel access to the page video.
Web viewer	Implemented	Quick testing, demos, gamepad rumble, and browser capture workflows	No extension install; requires manual tab/window capture; Gamepad haptics support varies by browser and controller.
Userscript	Spike only	Future fallback if the browser matrix passes	No v1 viewer exists; Stage E2 is pending/no-go until real Twitch/YouTube validation passes.

All current viewers consume the same QT1 protocol: a stream-embedded state frame, not an out-of-band command channel.

For trust boundaries, third-party client concerns, and malware-risk framing, see the QRTuber security notes.

For a first test, use the web viewer at https://qrtuber.com/app/ with the generator at https://qrtuber.com/app/generator/.