manifest: id

manifest: id — The id member specifies a unique, stable identifier for a PWA. Before id, browsers used start_url to identify installed apps — meaning changing start_url could make the browser treat the app as a new, different installation. The id member decouples identity from the start URL.

{
  "name": "My PWA",
  "id": "/my-app",
  "start_url": "/my-app/home",
  "display": "standalone"
}

If id is omitted, the browser defaults to the processed start_url (fragments are stripped during id processing, but query strings are preserved). An explicit id must be same-origin with the start_url.

Browser & ecosystem support

• Legend
• Yes
• Partial
• Flag
• No
• Unknown

Browser / Platform	Support	Versions	Confidence	Source	Notes
Chrome (Desktop)	Yes	96	high	source	—
Chrome (Android)	Yes	96	high	source	1
Edge (Desktop)	Yes	96	high	source	2
Firefox (Desktop)	No	—	high	source	3
Firefox (Android)	No	—	high	source	4
Safari (macOS)	Yes	17	high	source	—
Safari (iOS)	Yes	16.4	high	source	—
Samsung Internet	Yes	17.0	high	source	5
WebView (Android)	Yes	96	high	source	6

1. Derived by browser-compat-data mirroring from Chrome.
2. Derived by browser-compat-data mirroring from Chrome.
3. The property parses, but has no effect.
4. No Firefox for Android support is recorded in browser-compat-data.
5. Derived by browser-compat-data mirroring from Chrome Android.
6. Derived by browser-compat-data mirroring from Chrome Android.

Source data: /compatibility/manifest-id.json · Global usage: 90 % (StatCounter 2026-05)

Source: spec · MDN · Last verified 2026-10-03 · Confidence: high (computed from sources)

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