Firefox will be identified as "Not a supported browser." if mozGetUserMedia is removed #1156

    if (navigator.mozGetUserMedia) { // Firefox.
      result.browser = 'firefox';
      result.version = extractVersion(navigator.userAgent,
          /Firefox\/(\d+)\./, 1);
    } else if (navigator.webkitGetUserMedia) {
      // Chrome, Chromium, Webview, Opera.
      // Version matches Chrome/WebRTC version.
      result.browser = 'chrome';
      result.version = extractVersion(navigator.userAgent,
          /Chrom(e|ium)\/(\d+)\./, 2);
    } else if (navigator.mediaDevices &&
        navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) { // Edge.
      result.browser = 'edge';
      result.version = extractVersion(navigator.userAgent,
          /Edge\/(\d+).(\d+)$/, 2);
    } else if (navigator.mediaDevices &&
        navigator.userAgent.match(/AppleWebKit\/(\d+)\./)) { // Safari.
      result.browser = 'safari';
      result.version = extractVersion(navigator.userAgent,
          /AppleWebKit\/(\d+)\./, 1);
    } else { // Default fallthrough: not supported.
      result.browser = 'Not a supported browser.';
      return result;
    }