This package only supports Android. To support other platforms, you can install additional 3D WebView packages (Windows and macOS, iOS, UWP). 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.
The Android Gecko plugin uses OES textures, which don't currently work correctly with the Universal Render Pipeline.
Unlike the other 3D WebView packages, this package currently doesn't support transparent webviews.
The Android Gecko plugin supports dragging within a web page to select text but doesn't support drag-and-drop interactions. If you need drag-and-drop support, an alternative is to use the non-Gecko package instead of (or in addition to) this package.