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...
If a remote page can cause your browser to do fetches on your local machine, it can potentially poke at a lot of important stuff that has Web UIs running on the local machine.