Here's an old thread about this: https://news.ycombinator.com/item?id=21244440 I...

		mrsalt on Sept 24, 2021 \| parent \| context \| favorite \| on: Mozilla says Chrome’s latest feature enables surve... Here's an old thread about this: https://news.ycombinator.com/item?id=21244440 It's obvious when you the Page Visibility API original editors/authors: https://www.w3.org/TR/page-visibility-2/