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CloseIPvFox 0.8.6.1.1-signed.1-signed
by Dagger
List the hosts, and corresponding network addresses, from which a page and its resources are loaded.
About this Add-on
This is essentially a Firefox version of Chrome's IPvFoo, which supplied both the idea and icons.
(You may alternately be interested in SixOrNot or 4or6, which show similar information in slightly different ways.)