title: I get SourceMaps.loadSourceMapContents: Could not download sourcemap from chrome-extension when debugging my Angular 4 app on Mac with VSC
body: <p>I'm trying to debug on my MAC with Visual Studio Code.</p>
  
  <p><a href="https://github.com/angular/angular-cli/issues/2453" rel="nofollow noreferrer">I have followed this instructions, but without any luck...</a></p>
  
  <p>They recommended to add </p>
  
  <pre><code>  "sourceMapPathOverrides": {
      "webpack:///./*": "${webRoot}/*"
      },
  </code></pre>
  
  <p>In the launch.json, but I still get this error...</p>
  
  <pre><code>SourceMaps.loadSourceMapContents: Could not download sourcemap from chrome-extension://elgalmkoelokbchhkhacckoklkejnhcd/build/content-script.js.map
  SourceMaps.loadSourceMapContents: Could not download sourcemap from chrome-extension://elgalmkoelokbchhkhacckoklkejnhcd/build/ng-validate.js.map
  SourceMaps.loadSourceMapContents: Could not download sourcemap from chrome-extension://elgalmkoelokbchhkhacckoklkejnhcd/build/backend.js.map
  </code></pre>
  
  <p>I have this in launch.json in Visual Studio Code</p>
  
  <pre><code>{
    // Use IntelliSense to learn about possible Node.js debug attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
    "configurations": [
      {
        "type": "node",
        "request": "launch",
        "name": "nodemon",
        "runtimeExecutable": "nodemon",
        "runtimeArgs": [
          "--debug=5858"
        ],
        "program": "${workspaceRoot}/server/bin/www",
        "restart": true,
        "port": 5858,
        "console": "integratedTerminal",
        "internalConsoleOptions": "neverOpen"
      },
          {
            "name": "Client",
            "type": "chrome",
            "request": "launch",
            "url": "http://localhost:4200",
            "runtimeArgs": [
              "--user-data-dir",
              "--remote-debugging-port=9222"
            ],
            "sourceMaps": true,
            "trace": true,
            "webRoot": "${workspaceRoot}/client/",
            "sourceMapPathOverrides": {
              "webpack:///./*": "${webRoot}/*"
              },
            "userDataDir": "${workspaceRoot}/.vscode/chrome"
          },
      {
        "type": "node",
        "request": "launch",
        "name": "Server",
        "program": "${workspaceRoot}/server/bin/www",
        "outFiles": [
          "${workspaceRoot}/out/**/*.js"
        ]
      }
    ]
  }
  </code></pre>