And ad-blocker is not such a nice piece of software (as it sends your requests to third party servers just the same as ad-spyware).
What you want to use, is a script blocker. You can use Noscript, but it's crude in it's settings and cannot be finetuned.
A good alternative is Policeman, which is an add-on that lets you allow only those scripts and crosslinks that you are comfortable with. It's quite handy to use, isn't really annoying to use, and you can block crosslink scripts that spy on you, whilst still allowing the content you want to support or enjoy.