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README: Added more reasons the browsers trust first party

tags/v2.2
Geoffrey Frogeye 2 months ago
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Signed by: geoffrey <geoffrey@frogeye.fr> GPG Key ID: D8A7ECA00A8CD3DD
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@@ -14,8 +14,8 @@ However, to circumvent this block, tracker companies made the websites using the
The latter is a DNS redirection to `website1.trackercompany.com`, directly to an IP address belonging to the tracking company.

Those are called first-party trackers.
On top of aforementionned privacy issues, they also cause some security issue, as websites are usually configured to trust first-party scripts.
For more information, learn about [Cross-Origin Resource Sharing](https://enable-cors.org/).
On top of aforementionned privacy issues, they also cause some security issue, as websites usually trust those scripts more.
For more information, learn about [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP), [same-origin policy](https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy) and [Cross-Origin Resource Sharing](https://enable-cors.org/).

In order to block those trackers, ad blockers would need to block every subdomain pointing to anything under `trackercompany.com` or to their network.
Unfortunately, most don't support those blocking methods as they are not DNS-aware, e.g. they only see `somestring.website1.com`.


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