Disabling Third-Party Cookies Doesn’t (Meaningfully) Improve Privacy
The other is Apple’s Safari browser, which denies setting third-party cookies unless a user has “interacted” with the framed content. The definition of “interacted” is a bit fuzzy, but clicking seems to do it. No other browser does this, or anything like it. There are some laughably simple hacks around this, like floating an iframe under the user’s cursor (and, for some reason, submitting a form with a POST method). Even if those hacks didn’t exist, the idea is still pointless.