Hello all, I was wondering is there an extension that would do this:

1. I enter any address in the address bar, eg. http://twitter.com/
2. the browser asks me to block/unblock data incoming from http://twitter.com/

So far so good, there are extension and other ways that you can do this... but the next step is tricky:

3. while opening the page, some data will be coming from other domains, eg. http://a0.twimg.com , so the browser, again, asks me to block/unblock that other domain.
4. again some data will be coming from, eg. http://api.twitter.com , and the browser, yet again, asks me to block/unblock data coming from that domain.

...and so on, for every domain.