Statistics tracking, and ad-tracking.
1. Google.com
2. Google-analyitics
Unsure, possibly one ad running on your page?
3. Woopra.com
User tracking, for referral purposes. (They have a face-book account.)
4. Facebook.com
Not sure? possibly another ad you are viewing.
5. Chuug.com
National statistics, used to determine a websites value, for selling ad-space.
6. Quantserve.com
Most of the "Tracking" is anonymous... You are just a number, for sake of being any user. Such that the places you visit can show specific ads you might be interested in, as opposed to showing you random ones, which you don't have any interest in.
EG, all my browsers know I am from Jacksonville, Florida. I know this, because all the ads I see say this... "Meet hot girls in Jacksonville!"
If I visited garden sights, and researched Koi fish... I would see ads for, "Koi pond garden kit."
As opposed to seeing ads for, "Cement your yard and pond, who needs grass and swamp."
You can't stop them from tracking you. Just identifying you as a specific user. (They can still do that by your IP address, and they do. There is no real way to block that. If you do, you are using a remote virtual connection, and you are guaranteed to run into more viruses. They target anonymous browsers, because people pay more to know who those people are. Viruses are not for fun anymore, they are to gain money by injecting your computer with data-harvesters, for cold hard cash.)
Still, they know who is on the other side of those virtual proxies. They just ask your computer, and it freely tells them. It only takes one image or cookie inside a hidden iframe. No script required. (But it takes two separate websites to achieve that trick, and confirm the user.)
Seriously... unless you are a serial killer, or a child molester, or alkeida... why do you care? You are photographed and video recorded every day by security cameras, many are live online. You use credit cards, and they not only collect info, but they sell it to everyone who is willing to pay a dollar for it. (Not giving you anything in return for it, and actually charging you for it.) Not to mention, forums are how most people find out about you, and what you really are and want and like. How many forums do you frequent? How many blogs do you comment on? how many friends pages do you visit on sites like myspace or facebook?
Want to know the dirtiest trick...
When they send you an e-mail. There is an image in the e-mail that says...
yourname@youraddr.com.jpg (But in code, it looks like this... 5223422342554436345.jpg) Looks completely innocent... except it is not... that is a tracking ID.
Now your e-mail tries to download image 5223422342554436345.jpg from that website, but that image does not exist... now they know that
yourname@youraddr.com is a living real e-mail, since it was opened, and the e-mail tried to download the fishing image. (If you did not open the e-mail, or preview the e-mail... you would never have tried to download that image, and the junk-mail would stop. Now, since you did... they know your e-mail is real... and what IP address is yours. Since you send you IP to them, so that they could have sent the image back, for you to view, if it actually existed.)
Browsers work the same way...
Use it because you like it... Use it on another persons computer if you don't trust the websites you visit. LOL.