Manifest start_url browser support

The start_url manifest member names the URL that loads when a user launches an installed PWA from the home screen, the app shelf, or the launcher.

The table covers the member as recorded in MDN browser-compat-data; the Chromium rows note that start_url is required for a web app to be installable.

• 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)

See also

• Manifest start_url
• Web Application Manifest: start_url member (w3.org)
• start_url (developer.mozilla.org)