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Firefox Monitor
Firefox Monitor alerts you when your personal information appears in known data breaches
since Jun 16, 2026 · HTTP 200
CohortClass of 2026What it is
Firefox Monitor alerts you when your personal information appears in known data breaches. Get notified about compromised accounts and receive guidance on protecting your online identity. Stay informed about security threats affecting your digital accounts.
HTTP liveness
9 probes since Jun 16Jun 16Jul 15
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — redirectedRedirected offsite
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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