None of these measures protect you against tracking, though. And if they don't, why use them? It's better to be honest with yourself and admit how effective tracking is nowadays.
Your user agent plus unique plugin installations plus fonts installed equals a unique fingerprint across IP addresses. The above isn't an exhaustive list, either. There are dozens of tricks to track you.
Is it really that effective? I admit I assumed it was hard to dodge the global advertisement apparatus, but maybe it's possible.
Example: jQuery is sometimes hosted on Google CDNs. You can't block that request without breaking the site, right? But that request sends all your info.
Yes, it's really that effective - blocking the facebook like button doesn't break most websites.
And typically a request for something like jquery from a CDN will contain little more than your IP address and cookies. You can even prevent the cookies from being sent if you want. The only way they could get away with more than this would be to modifying the resulting script to grab more info from your machine.
