Screen Break Keeper — Fullscreen Chrome breaks; not corner badges or "AI productivity" layers. IMMERSIVE — Focus ends → fullscreen (blur optional). PETS — Cute themes or your clips; gatekeeper for doom-scroll. FEATURES — Front-tab timer, allowlist or exclude, strict or relaxed, pomodoro or cumulative, optional next nudge. No AI, no account, no uploads; local & free. Immersive, pet-forward fullscreen.