That’s an interesting ability to give websites.https://twitter.com/kennethrohde/status/1171668985365950464?s=21 …
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...and we work to make sure folks are integrating through the Permissions API for introspection: https://w3c.github.io/wake-lock/#permissions-and-user-prompts …
Together, those choices mean that UAs are allowed to implement whatever UI and grant/deny behavior they want. That's in addition to the normative restrictions we *tend* to put on powerful APIs that aren't as controversial (secure origin, top-level document, etc.)
So what's Blink gonna do? It might change! There's an allergy by some on the team to gate on install, so instead we use install to signal that an app is "high engagement", then gate (some) API access for *that* (a fully local calculation): chrome://site-engagement/
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