Local Network Access browser support

Request.targetAddressSpace declares that a fetch destination is expected to resolve to the local or loopback address space. Support for that option alone does not establish support for every part of the Local Network Access permission rollout.

Support data corresponds to api.Request.targetAddressSpace in MDN browser-compat-data.

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

Browser / Platform	Support	Versions	Confidence	Source	Notes
Chrome (Desktop)#	Yes	142	high	source	—
Chrome (Android)#	Yes	142	high	source	1
Edge (Desktop)#	Yes	142	high	source	2
Firefox (Desktop)#	No	—	high	source	3
Firefox (Android)#	No	—	high	source	45
Safari (macOS)#	No	—	high	source	6
Safari (iOS)#	No	—	high	source	78
Samsung Internet#	Yes	30.0	high	source	9
WebView (Android)#	No	—	high	source	10

1. Derived by browser-compat-data mirroring from Chrome.
2. Derived by browser-compat-data mirroring from Chrome.
3. No Firefox support is recorded in browser-compat-data.
4. No Firefox for Android support is recorded in browser-compat-data.
5. Derived by browser-compat-data mirroring from Firefox.
6. No Safari support is recorded in browser-compat-data.
7. No Safari on iOS support is recorded in browser-compat-data.
8. Derived by browser-compat-data mirroring from Safari.
9. Derived by browser-compat-data mirroring from Chrome Android.
10. No WebView Android support is recorded in browser-compat-data.

Source data: /compatibility/local-network-access.json · Global usage: 75 % (StatCounter 2026-09, CC BY-SA 4.0)

Source: spec · MDN · Last verified 2026-10-28 · Confidence: high (computed from sources)

Scope

The option does not grant permission or bypass CORS. It lets the browser apply the Local Network Access address-space and mixed-content rules, then reject a request whose resolved address does not match the declaration.

See also

• Local Network Access
• Local Network Access (wicg.github.io)
• Request: targetAddressSpace property (developer.mozilla.org)