Paste a URL in a slot, hit Open. First time, Chrome will ask to allow popups — click Always allow for this file.
Open all opens every slot with a URL at once (one click = one gesture, so popups all fire).
Layouts reposition whichever popups are currently open. Relayout re-applies the last layout.
Focus mode: pick a slot → that window takes ~75% of the screen, others stack as a sidebar.
Presets: fill in labels/URLs, name it, hit Save current. Reload any time.
Mute / unmute: right-click a popup's tab/titlebar area in Chrome → Mute site. Or press Ctrl+M with the Tab Mute extension. (A hotkey-driven mute-swap companion can be added later.)
Fullscreen a single game: click into that popup and press F11, or use the stream's own fullscreen button.
DRM streams (Prime Video, DirecTV Stream, ESPN+, Max, etc.) must be opened this way — not embedded. You'll log in inside each popup once; Chrome remembers the session.
Multi-monitor: click "Enable multi-monitor" above, grant permission, then layouts will span all detected screens.