In response to 0.0.0.0 day, Firefox Nightly version 131 had introduced a new security measure: blocking access to 0.0.0.0/::/::ffff:0.0.0.0 addresses. This change is currently live for Nightly users and will be gradually rolled out to all release users in the near future. Before we implement this ch...
Try the Firefox Developer version. No addons.
EDIT: Thanks for the suggestions. While I was investigating I ended up looking and had a proxy issue. Obviously a problem on my part.
That would kill development, because accessing http services locally is something pretty much only developers do. What is the error message?
Unable to connect
Firefox can’t establish a connection to the server at 192.168.2.210.
I don’t see an error in the log about the specific page I am trying to access, but another had a link to https://support.mozilla.org/en-US/kb/https-only-prefs?utm_source=mozilla&utm_medium=firefox-console-errors&utm_campaign=default&as=u
I don’t think they ware going to start disabling http. Http is needed in a lot of cases to get https plus there are still use cases for http like testing.
Have you fired up Wireshark and looked at what port it is connecting to?
Thanks for the suggestions. While I was investigating I ended up looking and had a proxy issue. Obviously a problem on my part.
And of course adding an exception or turning it off doesn’t work either.
Perhaps a bug then? AFAIK, “developer edition” is basically just nightly.