Review for RequestPolicy by AKA
Rated 4 out of 5 stars
This add-on is very interesting as it gives information about existing cross-site request, it should be in the future a good companion to "NoScript" and "Ghostery".
However at this time, the default behavior is to forbid all cross-site Request except the you have allowed manually : it is too much work to allow them one by one for all sites (some sites does not work well if you don't).
I will test it again if in future version the default behavior could be changed to allow everything except the one you forbid manually.
To create your own collections, you must have a Mozilla Add-ons account.