It's good advice, but bizarrely some browsers ignore Referrer-Policy, even when it requests "no-referrer", which basically increases the privacy level to the maximum possible - beyond for example the origin-only settings which the browser defaults are now tending towards (such as with this Firefox update).
You would think that Safari would jump at the chance to show no referrer, given Apple's attempts to position themselves as champions of user privacy, but for some reason the opposite is in fact true.
In my testing, all recent versions of Safari on iOS were the worst offenders here. I talked more about this here: https://twitter.com/arbuge/status/1354805900268105743
You would think that Safari would jump at the chance to show no referrer, given Apple's attempts to position themselves as champions of user privacy, but for some reason the opposite is in fact true.