Index: frontend/node_modules/react-dev-utils/openBrowser.js
===================================================================
--- frontend/node_modules/react-dev-utils/openBrowser.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/react-dev-utils/openBrowser.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,153 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+var chalk = require('chalk');
+var execSync = require('child_process').execSync;
+var spawn = require('cross-spawn');
+var open = require('open');
+
+// https://github.com/sindresorhus/open#app
+var OSX_CHROME = 'google chrome';
+
+const Actions = Object.freeze({
+  NONE: 0,
+  BROWSER: 1,
+  SCRIPT: 2,
+});
+
+function getBrowserEnv() {
+  // Attempt to honor this environment variable.
+  // It is specific to the operating system.
+  // See https://github.com/sindresorhus/open#app for documentation.
+  const value = process.env.BROWSER;
+  const args = process.env.BROWSER_ARGS
+    ? process.env.BROWSER_ARGS.split(' ')
+    : [];
+  let action;
+  if (!value) {
+    // Default.
+    action = Actions.BROWSER;
+  } else if (value.toLowerCase().endsWith('.js')) {
+    action = Actions.SCRIPT;
+  } else if (value.toLowerCase() === 'none') {
+    action = Actions.NONE;
+  } else {
+    action = Actions.BROWSER;
+  }
+  return { action, value, args };
+}
+
+function executeNodeScript(scriptPath, url) {
+  const extraArgs = process.argv.slice(2);
+  const child = spawn(process.execPath, [scriptPath, ...extraArgs, url], {
+    stdio: 'inherit',
+  });
+  child.on('close', code => {
+    if (code !== 0) {
+      console.log();
+      console.log(
+        chalk.red(
+          'The script specified as BROWSER environment variable failed.'
+        )
+      );
+      console.log(chalk.cyan(scriptPath) + ' exited with code ' + code + '.');
+      console.log();
+      return;
+    }
+  });
+  return true;
+}
+
+function startBrowserProcess(browser, url, args) {
+  // If we're on OS X, the user hasn't specifically
+  // requested a different browser, we can try opening
+  // Chrome with AppleScript. This lets us reuse an
+  // existing tab when possible instead of creating a new one.
+  const shouldTryOpenChromiumWithAppleScript =
+    process.platform === 'darwin' &&
+    (typeof browser !== 'string' || browser === OSX_CHROME);
+
+  if (shouldTryOpenChromiumWithAppleScript) {
+    // Will use the first open browser found from list
+    const supportedChromiumBrowsers = [
+      'Google Chrome Canary',
+      'Google Chrome',
+      'Microsoft Edge',
+      'Brave Browser',
+      'Vivaldi',
+      'Chromium',
+    ];
+
+    for (let chromiumBrowser of supportedChromiumBrowsers) {
+      try {
+        // Try our best to reuse existing tab
+        // on OSX Chromium-based browser with AppleScript
+        execSync('ps cax | grep "' + chromiumBrowser + '"');
+        execSync(
+          'osascript openChrome.applescript "' +
+            encodeURI(url) +
+            '" "' +
+            chromiumBrowser +
+            '"',
+          {
+            cwd: __dirname,
+            stdio: 'ignore',
+          }
+        );
+        return true;
+      } catch (err) {
+        // Ignore errors.
+      }
+    }
+  }
+
+  // Another special case: on OS X, check if BROWSER has been set to "open".
+  // In this case, instead of passing `open` to `opn` (which won't work),
+  // just ignore it (thus ensuring the intended behavior, i.e. opening the system browser):
+  // https://github.com/facebook/create-react-app/pull/1690#issuecomment-283518768
+  if (process.platform === 'darwin' && browser === 'open') {
+    browser = undefined;
+  }
+
+  // If there are arguments, they must be passed as array with the browser
+  if (typeof browser === 'string' && args.length > 0) {
+    browser = [browser].concat(args);
+  }
+
+  // Fallback to open
+  // (It will always open new tab)
+  try {
+    var options = { app: browser, wait: false, url: true };
+    open(url, options).catch(() => {}); // Prevent `unhandledRejection` error.
+    return true;
+  } catch (err) {
+    return false;
+  }
+}
+
+/**
+ * Reads the BROWSER environment variable and decides what to do with it. Returns
+ * true if it opened a browser or ran a node.js script, otherwise false.
+ */
+function openBrowser(url) {
+  const { action, value, args } = getBrowserEnv();
+  switch (action) {
+    case Actions.NONE:
+      // Special case: BROWSER="none" will prevent opening completely.
+      return false;
+    case Actions.SCRIPT:
+      return executeNodeScript(value, url);
+    case Actions.BROWSER:
+      return startBrowserProcess(value, url, args);
+    default:
+      throw new Error('Not implemented.');
+  }
+}
+
+module.exports = openBrowser;