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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
0.0.0.0 binds to all addresses on the machine for servers, but I don't know what a browser would do when trying to resolve it. I guess look at all addresses on the machine and see if anything has bound to the indicated port on that address? First one it finds wins?