[yjftsjthsd-h]

> If they do care about privacy it would be good for them to copy Safari and make this 7 days.

If I get logged out of every website on a weekly basis I'm going to be annoyed.

> This is being abused by advertisers to track you across the web.

How do they use first party cookies to track you?

[davidfischer]

There's a few ways first party cookies can track you. Probably the biggest single way is Google Analytics which by default uses only first party cookies. Even without cookies at all, GA could track you across the web although first party cookies do make this a little easier and "better". However, first party cookies can help trackers in other ways like for CNAME cloaking[1] which basically makes a first-party cookie function similarly to a third-party one.

Disclosure: I work for a small privacy focused ad company.

[1] https://webkit.org/blog/11338/cname-cloaking-and-bounce-trac...

[threeseed]

> If I get logged out of every website on a weekly basis I'm going to be annoyed.

Then those websites should move to Passkeys.

> How do they use first party cookies to track you?

Because Meta and Google allows websites to submit advertising data to them server side using a self-hosted JS file which sets the first party cookies on your behalf.

[yjftsjthsd-h]

> Because Meta and Google allows websites to submit advertising data to them server side using a self-hosted JS

How does ex. 7d expiration help with that?

[majorchord]

> How do they use first party cookies to track you?

domain fronting