Apparently doesn't impact my Android phone app, only my Firefox browser.

Apparently my outbound messages are stuck in the cache queue? Sorry to anyone to whom I sent messages from my browser during this outage...

Workaround is to use cache1:

In your browser, under Settings, Network, Caching Service, Connect to a different caching service, and enter:
wss://cache1.primal.net/v1

🟢 cache1.primal.net (148.251.137.175): 200 OK (Valid SSL - Only working node)
🔴 cache2.primal.net (148.251.137.175): SSL Cert Expired Aug 27
🔴 cache3.primal.net (104.26.8.197): 502 Bad Gateway
⚪ cache4.primal.net / cache5.primal.net: NXDOMAIN

cc: @miljan