Platform Support Matrix

Current Repo Runtime Status

Platform	`NativeWebView` control	`NativeWebDialog`	`WebAuthenticationBroker`	Per-instance proxy	Favicon	Downloads
Windows	Implemented	Implemented	Implemented	Implemented	Implemented, including SVG originals via favicon URI	Implemented through WebView2
macOS	Implemented	Implemented	Implemented	Implemented on macOS 14+	Not advertised by the current embedded backend	Not advertised; WKDownload bridge pending
Linux	Implemented	Implemented	Implemented	Implemented	Implemented through document favicon link resolution	Implemented through WebKitGTK
iOS	Implemented when built with the .NET 8 Apple workload	Unsupported	Implemented when built with the .NET 8 Apple workload	Implemented on iOS 17+ when built with the .NET 8 Apple workload	Implemented in the iOS runtime assembly	Unsupported
Android	Implemented when built with the .NET 8 Android workload	Unsupported	Implemented when built with the .NET 8 Android workload	Contract-only, app-wide platform API only	Implemented in the Android runtime assembly	Unsupported
Browser	Implemented when built for the browser target	Unsupported	Implemented when built for the browser target	Unsupported	Unsupported	Unsupported

Use NativeWebViewPlatformImplementationStatusMatrix.Get(platform) to inspect the current repo status in code. Use NativeWebViewProxyPlatformSupportMatrix.Get(platform) for proxy-specific status.

Capability Contract Notes

Registered backend modules and Features continue to describe the broader platform capability contract for that engine family.
Current repo runtime status is intentionally tracked separately so docs and applications can distinguish stubbed contracts from implemented native host paths.
Today, Windows, macOS, and Linux have real embedded NativeWebView control hosts in the default desktop build. iOS and Android runtime paths are built from their platform-targeted backend assemblies rather than the default net10.0 contract build, and the Browser runtime is built from the browser-targeted backend assembly and hosts an iframe plus popup/browser-auth integration through Avalonia Browser native control hosting.
Download support is currently an in-memory per-view queue on Windows and Linux only. Windows supports native WebView2 pause/resume/cancel capabilities where available; Linux supports WebKitGTK destination, progress, completion/failure, and cancel.

Practical Notes

NativeWebDialog is a desktop surface in this repo. For mobile and browser auth flows, use WebAuthenticationBroker instead of expecting dialog parity.
Browser auth is popup-based and currently requires popup support plus an inspectable http or https callback URL.
Per-instance proxy status should be read separately from general runtime status. Use NativeWebViewProxyPlatformSupportMatrix.Get(platform) when proxy behavior matters to your deployment.