<!--
  Note: if the issue is about documentation or the website, please file it at:
  https://github.com/reactjs/reactjs.org/issues/new
-->

**Do you want to request a *feature* or report a *bug*?**
Bug

**What is the current behavior?**
“Welcome to the new React DevTools!” message blocks the devtool panel every time the it is opened.

**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem. Your bug will get fixed much faster if we can run your code and it doesn't have dependencies other than React. Paste the link to your JSFiddle (https://jsfiddle.net/Luktwrdm/) or CodeSandbox (https://codesandbox.io/s/new) example below:**
1. Open a website with React with DevTools installed.
2. Open the Component tab.
3. Dismiss the welcome screen.
4. Close the devtools and open it again.

**What is the expected behavior?**
Dismissing the “Welcome to the new React DevTools!” message should be permanent.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
DevTools: 4.0.5
Chrome: 77.0.3865.35
};
    initialize(socket);
  });
  server.on('error', event => {
    onError(event);
    log.error('Failed to start the DevTools server', event);
    startServerTimeoutID = setTimeout(() => startServer(port), 1000);
  });
  httpServer.on('request', (request, response) => {
    
    const backendFile = readFileSync(join(__dirname, 'backend.js'));
    
    
    
    
    const savedPreferencesString = `
      window.__REACT_DEVTOOLS_COMPONENT_FILTERS__ = ${JSON.stringify(
        getSavedComponentFilters(),
      )};
      window.__REACT_DEVTOOLS_APPEND_COMPONENT_STACK__ = ${JSON.stringify(
        getAppendComponentStack(),
      )};`;
    response.end(
      savedPreferencesString +
        '\n;' +
        backendFile.toString() +
        '\n;' +
        'ReactDevToolsBackend.connectToDevTools();',
    );
  });