Published Paper Details:

Digital knowledge work is increasingly performed inside the same browser environment that also hosts high-frequency leisure platforms, social feeds, and streaming services. Prior studies on interruption, self-interruption, and media multitasking indicate that context switching can impose a substantial productivity cost, with project evidence estimating up to 40 percent output loss during unmanaged digital work. Existing tools address only fragments of the problem: static blockers impose binary denial, passive trackers generate retrospective awareness without enforcement, and gamification systems often reward intention rather than verified work. This paper presents TFI Master V12, a Chrome Manifest V3 browser extension that implements a privacy-preserving Work-to-Social economy governed by a strict 4:1 work-to-leisure ratio. The system introduces Active Trace Technology, in which keyboard events contribute 5 points, mouse events contribute 1 point, and a pulse buffer validates genuine user presence before productive time is credited. A browser-local ledger stored in chrome.storage.local is updated by an Economy Engine finite state machine running in an MV3 service worker through Chrome Alarms. When leisure balance is exhausted, a tamper-resistant lockdown overlay with z-index 2147483647 and MutationObserver re-injection is injected into social domains. Benchmarks show average memory consumption below 30 MB, negligible CPU impact during one-second ticks, and user trials indicating a 35 percent increase in sustained focus periods. The results show that verified productivity management can be enforced locally without cloud surveillance.