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Correcting two mistakes in data about support in Safari:
"Partial support" on macOS is due to the requirement for macOS Ventura. That requirement no longer applies for Safari 18.0+. In order to apply this note to Safari 16.1-17.7 only, I split footnote 5 ("Only available on macOS 13 Ventura or later and only in Safari itself, not WKWebView nor SFSafariViewController") into two separate footnotes.
Footnote 6 currently reads "Requires website to first be added to the Home Screen. Delivered silently, meaning no sound, vibration, haptics or screen wake." First, this footnote is being renumbered as footnote 7 (to make 5 become 5 & 6). Second, the claim "Delivered silently, meaning no sound, vibration, haptics or screen wake" is untrue — so I've simply deleted the sentence. More information about how sound, vibration, haptics or screen wake work with Web Push on iOS is available at https://webkit.org/blog/12945/meet-web-push/.