Here's a URL that was produced by triggering the "Open DevTools in the browser" action:

http://127.0.0.1:9100/?wasm=true#?cacheBust=dart-3.7.0-188.0.dev-flutter-3.27.0-1.0.pre.669&ide=VSCode&ideFeature=command&theme=dark&uri=ws%3A%2F%2F127.0.0.1%3A60408%2FZJPl0ajZ8IM%3D%2Fws&page=home

The cacheBust param and all following are tacked on to the end instead of adding to the existing query parameters like wasm=true. Additionally, we shouldn't need the # sign which may be getting added by VS code.