Is Mozilla Firefox down in the US?
Checks passingin the US, measured from Ashburn and San Jose
All 2 of our probes in the US, in Ashburn and San Jose, read checks passing when they last checked Mozilla Firefox at Nov 5, 2026, 5:24 PM UTC.
Over the last 24 hours we completed 247 checks from Ashburn and San Jose and 247 answered cleanly, 100.00% availability.
Of the 2 other regions we check Mozilla Firefox from, all 2 read checks passing right now.
Email me the next time we see Mozilla Firefox go down
What our Ashburn and San Jose probes measured
Last checked Nov 5, 2026, 5:24 PM UTC.
Mozilla Firefox from Ashburn and San Jose over the last 30 days
Over the last 30 days, Mozilla Firefox answered our Ashburn probe in 813 ms on average, and 1 check in 20 took longer than 1,347 ms.
Over the last 30 days, Mozilla Firefox answered our San Jose probe in 1,067 ms on average, and 1 check in 20 took longer than 2,212 ms.
Ranked by average response time across the 4 cities we check Mozilla Firefox from, Ashburn 2nd, San Jose 3rd; Frankfurt was fastest at 648 ms and Tokyo slowest at 1,298 ms.
From Ashburn and San Jose we ran 770 checks of Mozilla Firefox in 4 days, and 769 answered cleanly: 99.87% availability.
1 of the 4 days had at least one failed check. The weakest was Nov 3 (UTC), at 99.58% across 243 checks.
In Ashburn local time (EST), Mozilla Firefox was slowest around 2 PM, at 1,138 ms on average over the last 14 days, and quickest around 1 AM, at 576 ms.
| Day (UTC) | Checks | Availability | Average response |
|---|---|---|---|
| Thu, Nov 5 | 178 | 100.00% | 967 ms |
| Wed, Nov 4 | 247 | 100.00% | 784 ms |
| Tue, Nov 3 | 243 | 99.58% | 868 ms |
| Mon, Nov 2 | 102 | 100.00% | 1,310 ms |
Mozilla Firefox outages measured from the US
Our Ashburn and San Jose probes measured no confirmed Mozilla Firefox outage in the last 90 days.
How the other regions read right now
Of the 2 other regions we check Mozilla Firefox from, all 2 read checks passing right now.
| Probe city | Right now | Last 24h |
|---|---|---|
| Frankfurt | Checks passing | 100.00% of 97 checks |
| Tokyo | Checks passing | 100.00% of 58 checks |
Other countries we check Mozilla Firefox from
How we measured this
The US readings on this page come from RealUptime's own Ashburn and San Jose probes against Mozilla Firefox's public endpoints. They are not user reports, and they are not Mozilla Firefox's own status page.
See Mozilla Firefox's full check readings, the 90-day history by region, or the outage tracker methodology.
The US readings here are taken from that country and show the time of the last one, but Mozilla Firefox has not yet accumulated enough continuous history for us to publish this page to search engines.
Check your own site from Ashburn
This page shows what we see when we check this service, using the same ten regions, for a site you run. RealUptime Monitor watches your own servers from inside your network, and it starts free.
Start monitoring your own serversRun a service people depend on? Give them a status page on your own domain, checked every minute from six regions, for $9 a month. Get Starter