92
Firefox Blocks 0.0.0.0 IP Addresses: Tell Us What This Means To You!
(connect.mozilla.org)
A place to discuss the news and latest developments on the open-source browser Firefox
I just wish they'd stop blocking http requests on lan addresses honestly.
Thanks for the suggestions. While I was investigating I ended up looking and had a proxy issue. Obviously a problem on my part.
Pretty sure you have an addon doing that, because Firefox doesn't.
Firefox Developer with no addons