Serve Static Content from a Cookieless Domain (Deprecated)
What is a Cookieless Domain?
Cookieless Domains: Additional Factors
However, there are still methods to consider if you want to serve content from a cookieless domain. For example, if you are utilizing a CDN for serving content, a lot of CDN providers will automatically take care of this and will remove the set-cookie response header. Just make sure to check with your provider on how to set this up correctly. Lastly, another method that you can use is to set up a specific subdomain to serve your static content. WordPress, for example, provides the option to set up a subdomain that points to your domain, however, this method requires a bit more configuration and not as straightforward as the other options.
Lighthouse is an open-source tool that is used to run an audit against your web pages and provides scores and suggestions for improving page performance, accessibility, SEO, and more.
PageSpeed Insights is a tool created by Google that reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.