This package only supports Android. To support other platforms, you can install additional 3D WebView packages (Windows and macOS, iOS, UWP, WebGL, or create a custom bundle). All of the 3D WebView packages work seamlessly together, so all you need to do is install them into the same project, and then 3D WebView automatically detects and uses the correct plugin at runtime and build time.
3D WebView's native Android plugins are provided as precompiled libraries, and the native source code for them is not provided.
3D WebView's native Android plugins can't run in the editor, so a mock webview implementation is used by default while running in the editor. However, you can actually load and render real web content in the editor by also installing 3D WebView for Windows and macOS into the project.
Unlike the other 3D WebView packages, this package currently doesn't support transparent webviews.
This package supports Universal Render Pipeline (URP), but WebViewPrefab doesn't currently support the "SRP Batcher" option. So, when using URP, you must either disable SRP Batcher in URP settings or use CanvasWebViewPrefab instead of WebViewPrefab.
The Android Gecko package doesn't currently support the Build App Bundle build option (GeckoView limitation).