Review for RequestPolicy by Creig Smith
Rated 5 out of 5 stars
A great security tool. Sometimes a nuisance to keep adding new sites to the approved list, but it has prevented me from going to unintended bad sites several times, and blocks ads. I wouldn't surf without it. It's good to know what material is being pulled into a page before it's too late. Especially Javascript where unknown danger may lurk.
I would like to see it enhanced to allow CSS sheets to be accessed without prior approval, possibly images too.
To create your own collections, you must have a Mozilla Add-ons account.