title: Why won't my Flutter web app debug open in the browser?
body: <p>In VScode, I used to be able to go 'Run' -&gt; 'Run without debugging' and if the 'Web server (web-javascript)' was chosen then the Flutter app would open in debug mode in Chrome. This used to open a new Chrome window for the app to be displayed in. I'm not sure what I've done but this no longer works. I now get the message below showing in the debug console. I have tried to go to the localhost link in Chrome but I just get a blank screen and no errors in the Chrome console. I've tried downloading the Dart extension in Chrome but this doesn't help.</p>
  <pre><code>Launching lib\main.dart on Web Server in debug mode...
  Waiting for connection from Dart debug extension at http://localhost:51367
  </code></pre>
  <p>So far I have tried reinstalling VScode and Flutter, reinstalling the Dart and Flutter extensions. I've even tried to uninstall VScode and remove all the extension and settings files that get left behind (<a href="https://www.logicbig.com/how-to/visual-studio-code/remove-vs-code-completely.html" rel="noreferrer">like mentioned here</a>). I've set Flutter up as the Flutter website says every time but none of this has helped and I have no idea what has gone wrong. Could anyone help?</p>
  <p>In case it helps, here is the Flutter doctor output:</p>
  <pre><code>Downloading android-arm-profile/windows-x64 tools...                1.7s
  Downloading android-arm-release/windows-x64 tools...                0.8s
  Downloading android-arm64-profile/windows-x64 tools...              1.2s
  Downloading android-arm64-release/windows-x64 tools...              1.3s
  Downloading android-x64-profile/windows-x64 tools...                2.2s
  Downloading android-x64-release/windows-x64 tools...                1.0s
  Doctor summary (to see all details, run flutter doctor -v):
  [√] Flutter (Channel beta, 1.20.0-7.3.pre, on Microsoft Windows [Version 10.0.18362.959], locale en-GB)
  
  [√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
  [√] Chrome - develop for the web
  [√] Android Studio (version 4.0)
  [√] VS Code (version 1.47.3)
  [√] Connected device (2 available)
  
  • No issues found!
  </code></pre>