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TabTimer
TabTimer is a Chrome extension that displays a running timer in each open tab, helping users track how long they've had tabs open
verified Jul 13, 2026 · HTTP 200
CohortClass of 2026What it is
TabTimer is a Chrome extension that displays a running timer in each open tab, helping users track how long they've had tabs open. Perfect for managing tab overload and rediscovering forgotten tabs that have been open for extended periods.
HTTP liveness
9 probes since Jun 16Jun 16Jul 13
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
9 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2026weekly
567 products launched in 2026 · 100% still active
567 active0 sunset
Still active
100%
Median lifespan
4.9y