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.
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
And of course adding an exception or turning it off doesn’t work either.