Review for IPvFox by Firefox Cool
Rated 4 out of 5 stars
Shows all the IPs (for all the elements) in a webpage, not just the domain of the url, but also where the images, videos and (hopefully) javascripts come from. Much more useful than other show IP add-ons. Draw backs are the ugly interface and (annoyingly) poor formatting if copy-pasted into text editor.
To create your own collections, you must have a Mozilla Add-ons account.