File handlersLimited availability
The file_handlers web app manifest member registers an installed web app as a handler for files with specific file extensions or MIME types.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–101Not supported
102+Supportedsince May 24, 2022
Current: 155Edge
12–101Not supported
102+Supportedsince May 31, 2022
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: files.
Feature detection
JS · check before using
if ("LaunchParams" in globalThis && "files" in LaunchParams.prototype) {
// LaunchParams.files is available
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (2). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| LaunchParams.files | 102 | 102 | ✕ | ✕ | ✕ | ✕ | ✕ |
| manifests.webapp.file_handlers | 102 | 102 | ✕ | ✕ | ✕ | ✕ | ✕ |