By feature

The by-feature view lists each PWA capability. Open any feature for its full OS × browser × version matrix, ecosystem policy rows, and provenance.

Feature	Category	Summary	Targets
Background Sync	Capabilities	Defer actions until the user has stable connectivity via the service worker.	7
Badging API	Engagement	Set an app-icon badge (count or dot) on the installed PWA.	7
File System Access API	Capabilities	Read and write to the user's local file system with explicit permission.	7
Install Prompt (beforeinstallprompt)	Installation	Programmatic control over the PWA install prompt via the beforeinstallprompt event.	7
Manifest Protocol Handlers	Manifest	Register a PWA to handle custom or allow-listed URL protocols via manifest.protocol_handlers.	7
Payment Request API	Commerce	Browser-mediated checkout sheet collecting payment and contact details.	7
Service Workers	Capabilities	The programmable network proxy that powers offline, caching, and push for PWAs.	7
Web App Manifest: display	Manifest	The display member chooses the installed app's window mode (standalone, fullscreen, minimal-ui, browser).	7
Web App Manifest: scope	Manifest	The scope member fences the installed app's navigation boundary.	7
Web App Manifest: screenshots	Manifest	The screenshots member supplies richer install UI in browsers and store listings.	7
Web Push	Engagement	Server-sent push messages delivered via the Push API + service worker, even when the app is closed.	7

11 features seeded and growing.

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