Firefox has been blocking third-party cookies since 2019: https://venturebeat.com/business/firefox-enhanced-tracking-protection-blocks-third-party-cookies-by-default/

Apple has been blocking third-party cookies since 2020: https://www.theverge.com/2020/3/24/21192830/apple-safari-intelligent-tracking-privacy-full-third-party-cookie-blocking

It's only Chrome and its derivatives that don't do this.