I'm not sure cookie declining is the way to go these days. You can use "I still don't care about cookies" to stop the dumb pop ups and something like "Firefox Total Cookie Protection" if you don't want to be tracked?
Personally I set Firefox to auto clear cookies on window close except some whitelisted sites. I just use accept all most of the times since it will be cleared anyways.
This is a false sense of security. Cookies isn’t random data. It is fingerprints and all kinds of dark wizardry. Chances are your cookies will be the same each time they are generated.
You have to disable cookies or tell the company responsible that you don’t want it. The latter, I believe (though ianal), is legally binding.
