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Firefox Quantum
The newest, fastest version of Firefox yet
verified Jul 13, 2026 · HTTP 200
CohortClass of 2017What it is
The newest, fastest version of Firefox yet. 🔥🦊 — Firefox Quantum is the newest, fastest version of Firefox yet. Launches November 14, 2017. Available in beta now for all. [Tech]
HTTP liveness
12 probes since Jun 12Jun 12Jul 13
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 12, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
12 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2017weekly
13,497 products launched in 2017 · 100% still active
13,462 active35 sunset
Still active
100%
Median lifespan
4.9y