v0.3.0 — /diag

A page that reports what a browser can actually do, measured on the device rather than guessed from its name.

A Fire TV shows no notification toggle here and on the sibling brand, and nothing published about Silk settles why: its Chromium version varies by device and by year, and Amazon does not document whether web push exists on it at all.

/diag reports the push manager, which is exactly what hides that toggle; MediaSource and every codec the player might need; both kinds of picture-in-picture; and whether the engine can even parse the syntax app.js is written in. It logs what a remote sends, key by key. It never requests a permission, so opening it cannot put a prompt on a television, and it shares no script and no stylesheet with the pages it measures.

Open it on the device and press Send; the report lands in the server log.