Web App Manifest: start_url

Web App Manifest: start_url — The start_url member identifies the URL that loads when a user launches an installed PWA from the home screen or app shelf.

Browser & ecosystem support

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

Browser / Platform	Support	Versions	Confidence	Source	Notes
Chrome (Desktop)	Yes	39	high	source	1
Chrome (Android)	Yes	39	high	source	23
Edge (Desktop)	Yes	79	high	source	45
Firefox (Desktop)	No	—	high	source	6
Firefox (Android)	Yes	79	high	source	—
Safari (macOS)	Yes	17	high	source	—
Safari (iOS)	Yes	11.3	high	source	—
Samsung Internet	Yes	4.0	high	source	78
WebView (Android)	Yes	39	high	source	910

1. `start_url` is required for a web app to be installable.
2. `start_url` is required for a web app to be installable.
3. Derived by browser-compat-data mirroring from Chrome.
4. `start_url` is required for a web app to be installable.
5. Derived by browser-compat-data mirroring from Chrome.
6. No Firefox support is recorded in browser-compat-data.
7. `start_url` is required for a web app to be installable.
8. Derived by browser-compat-data mirroring from Chrome Android.
9. `start_url` is required for a web app to be installable.
10. Derived by browser-compat-data mirroring from Chrome Android.

Source data: /compatibility/manifest-start-url.json · Global usage: 92 % (StatCounter 2026-05)

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

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