[dspillett]

I was meaning non-tracking essential cookies, as defined by privacy legislation that requires permission for things that are not essential for site features.

Or are you suggesting mainstream browsers are blocking same-origin session-level cookies by default now? I'm not aware of any. And if you have a browser that is blocking such things, the worst that will happen is the current behaviour (repeated mis-guesses because the preference isn't stored) continues.

[saagarjha]

Safari drops first-party cookies (and all other storage) on sites that have not seen interaction in 7 days.

[lapcat]

This is not entirely accurate. It's only script-writable storage. HTTP cookies are not removed.

I'm not defending Safari's policy, by the way, just describing. I think it sucks, and a conspiracy theorist might note how it favors native apps over web apps.

[saagarjha]

Thanks for the clarification!

[dspillett]

Needing to re-override the incorrectly detected mobile/not upon return after a full week away will be massively less annoying than needing to do it every new page request, so that shouldn't be problematical.

That Safari does this is useful information that I may need to warn users of one of my projects about, as it means intentionally offline data has a much shorter expiry date than on other platforms.

[ClassyJacket]

Wouldn't this log you out of everything?

[dspillett]

Everything you've not visited in the last seven days, yes.

Things you touch regularly should be fine.

And apparently it only affects mass local storage, not cookies which are most often used for season management (so you might stay logged in but the app need to reset data previously called in local storage).