Limited Availability Workers

Service workers static routing

The service worker install event's addRoutes method declares resource paths that should either be fetched from the network or the cache, to bypass the service worker and improve performance.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Sep 14, 2026.

Desktop Browser Engine Support

Google Chrome

123

Supported

Mozilla Firefox

—

Unsupported

Apple Safari

27

Supported

Microsoft Edge

123

Supported

Mobile Browser Engine Support

Chrome Android

123

Firefox Android

—

Safari iOS

27

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.InstallEvent ↗ api.InstallEvent.InstallEvent ↗ api.InstallEvent.addRoutes ↗