Understand what the web can see.

A page can load content from organizations other than the website you opened. Some of those requests help deliver a useful feature; others support tracking across visits or sites. A tracker blocker can stop selected requests from loading. The important question is what information a request would expose, and to whom.

Cookies can keep a session signed in or remember a preference. A third-party cookie belongs to a different site from the one in the address bar and can help connect activity across sites. Blocking or partitioning these cookies changes that connection. Browser settings matter, and removing cookies can also sign you out.

Browser fingerprinting combines observable characteristics, such as language, display properties and browser behavior. A combination may distinguish a browser even without a tracking cookie. A fingerprint is an inference from signals, not necessarily a directly readable hardware serial number. This is why clearing cookies and reducing fingerprinting exposure address different mechanisms.

A computer contains identifiers that local software may use for inventory, drivers or configuration. Their existence does not mean an ordinary website can read them directly. Access depends on the interface, the software's privileges and any permission the user grants. The technical tour explains those boundaries for displays, processors, firmware and network adapters.

Web communication also has a network context. The destination server receives connection information, while a local network adapter has its own properties used within the network. These are different layers. Changing a browser preference does not imply that every identifier across the operating system and the physical network has changed with it.

Name the mechanism you want to reduce, read the product's documented scope, then check what happens on websites you actually use. Keep the browser current and review extension permissions. If a feature breaks, identify the affected site and the exact step. A repeatable example is more useful than a single universal privacy score.