docs: public FirefoxProfile getFirefoxProfile() {
          if (firefoxProfile == null) {
              firefoxProfile = new FirefoxProfile();
  
              firefoxProfile.setAcceptUntrustedCertificates(true);
              firefoxProfile.setAssumeUntrustedCertificateIssuer(false);
  
              /* default download folder, set to 2 to use custom download folder */
              firefoxProfile.setPreference("browser.download.folderList", 2);
  
              /* comma separated list if MIME types to save without asking */
              firefoxProfile.setPreference("browser.helperApps.neverAsk.saveToDisk", "text/plain");
  
              /* do not show download manager */
              firefoxProfile.setPreference("browser.download.manager.showWhenStarting", false);
          }
  
          return firefoxProfile;
      }