> No, the idea is they're abusing existing APIs for fingerprinting purposes that Firefox privacy settings disallow

But that’s exactly what I’m saying: the author asserts as fact the reason Chrome worked was because it gives up more personal information but there’s no interrogation of whether that’s actually true and if true, how it’s achieved.

I’m no defender of Google I just believe we should be making arguments we’re able to actually back up.

I thought it was the opposite: that instead of fingerprinting users, web services would instead just ask the browser which topics the user is interested in and display the relevant ADs. It's an explicit design goal to reduce the dependence on fingerprinting users, otherwise why would they do it. Topics are supposed to be the locally sourced privacy preserving alternative to invasive tracking.

Whether Mozilla/Apple/others agree is a different story. The blowback has mostly been around how topics aren't perfect and the design still leaves room for abuse and therefor effectively devolves to traditional tracking: https://mozilla.github.io/ppa-docs/topics.pdf.