Not sure what th is, but ref is the referrer's ID, which gives the referrer a referral / affiliate bonus if you purchase the item using that link. In theory it's not a bad way to support the referrer and it's not linked to you as an individual personally. You can remove it of course if you feel like they don't deserve the money for referring you to a deal. In the end ref or no ref the price of the item remains the same for you.
I think firefox leaves the ref in intentionally.
I opened amazon in incognito then clicked on a random item from their front page, which was advertising their cyber monday deals at the time. In that case would it just be letting amazon know that that's how I ended up on that page, without serving any other real purpose?
Not sure what th is, but ref is the referrer's ID, which gives the referrer a referral / affiliate bonus if you purchase the item using that link. In theory it's not a bad way to support the referrer and it's not linked to you as an individual personally. You can remove it of course if you feel like they don't deserve the money for referring you to a deal. In the end ref or no ref the price of the item remains the same for you.
I think firefox leaves the ref in intentionally.
I opened amazon in incognito then clicked on a random item from their front page, which was advertising their cyber monday deals at the time. In that case would it just be letting amazon know that that's how I ended up on that page, without serving any other real purpose?
That's right!