Crash report storageLimited availability
The window.crashReport object is a key-value store to record information about your application's state. If there's a crash, then the data in the key-value store is sent to your crash reporting endpoint, to help you pinpoint the cause of the crash.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–144Not supported
145+Supportedsince Feb 10, 2026
Current: 155Edge
12–144Not supported
145+Supportedsince Feb 14, 2026
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–144Not supported
145+Supportedsince Feb 10, 2026
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Firefox, Safari, 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: CrashReportContext.
Feature detection
JS · check before using
if ("CrashReportContext" in globalThis) {
// CrashReportContext is available
} else {
// load a polyfill or use a fallback
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (5). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| CrashReportContext | 145 | 145 | ✕ | ✕ | 145 | ✕ | ✕ |
| CrashReportContext.delete | 145 | 145 | ✕ | ✕ | 145 | ✕ | ✕ |
| CrashReportContext.initialize | 145 | 145 | ✕ | ✕ | 145 | ✕ | ✕ |
| CrashReportContext.set | 145 | 145 | ✕ | ✕ | 145 | ✕ | ✕ |
| Window.crashReport | 145 | 145 | ✕ | ✕ | 145 | ✕ | ✕ |