Your data is worth more than you can imagine, and this is why advertisers turn to all kinds of tactics to collect information about you, including a method that is known as fingerprinting. Learn about fingerprinting and how Firefox blocks this privacy threat by default:
In essence a type of tracking, fingerprinting comes down to an entire profile that ad companies create about you. This profile contains super-detailed information about you, including not only the browser that you use, the operating system resolution, and things like that, but also fonts, screen size, and other unique data that is then used to make a difference between your profile and another.
Obviously, not everyone agrees to give up on this data when browsing the web, so such info is often collected without users to even know about it.
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