Protocol handlersLimited availability
The protocol_handlers web app manifest member registers an installed web app as a handler for a specific protocol. When a user follows a link with the specified protocol, the installed app opens the link.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–95Not supported
96+Supportedsince Nov 15, 2021
Current: 155Edge
12–95Not supported
96+Supportedsince Nov 19, 2021
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
✕Not supportedup to 155
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Firefox, Safari, Chrome Android, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: protocol handlers.
Feature detection
There’s no simple runtime check for this feature; rely on the support table and test in your target browsers.
Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (3). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| manifests.webapp.protocol_handlers | 96 | 96 | ✕ | ✕ | ✕ | ✕ | ✕ |
| manifests.webapp.protocol_handlers.protocol | 96 | 96 | ✕ | ✕ | ✕ | ✕ | ✕ |
| manifests.webapp.protocol_handlers.url | 96 | 96 | ✕ | ✕ | ✕ | ✕ | ✕ |