I am not able to load any websites with Firefox on my PC despite having an internet connection. I went on Reddit and found other people complaining of the exact same issue, so it appears to be a problem with firefox: https://www.reddit.com/r/firefox/comments/s2u7eg/is_firefox_down/
My phone’s firefox browser works fine.
What can cause a browser to fail this way?
Apparently HTTP3 was enabled but an update to Google’s implementation triggered a long-existing bug. So the browser didn’t update but a server-side update triggered an existing bug.
My understanding is that Google has rolled back the update.
Details from a Mozilla security employee: https://lobste.rs/s/zcjtv2/1749908_infinite_loop_http3_hangs_socket#c_kikbal