Add-on Whitelist of image hosts

Hi there,

I need an addon that allows for "whitelisting" domain names for allowed image hosting sites. There are exploits with some image hosting sites to grab people's IPs, and while I could use the image proxy to prevent that, it tends to have issues and I don't find it to be an ideal solution for a couple of reasons.

I would really appreciate if someone could create this and it would mean a lot to me.