https://www.marketingdive.com/news/report-facebook-pixel-adds-first-party-cookies-option-for-advertisers/539064/
Report: Facebook Pixel adds first-party cookies option for advertisers | Marketing Dive
An opted-in first-party relationship must be established before any tracking or measurement occurs.
first party cookiesfacebook pixel
https://matomo.org/blog/2011/03/piwik-1-2-custom-variables-first-party-cookies-and-more/
Matomo 1.2: Custom Variables, First party cookies, and more - Analytics Platform - Matomo
first party cookies1 2custom variables
https://arxiv.org/abs/2208.12370
[2208.12370] COOKIEGRAPH: Understanding and Detecting First-Party Tracking Cookies
Abstract page for arXiv paper 2208.12370: COOKIEGRAPH: Understanding and Detecting First-Party Tracking Cookies
first party2208understandingdetectingtracking