async function StorageGetDomains() {
  const data = await browser.storage.sync.get('domains');
  if (data.domains.length === 0) {
    StorageUpdateDomainList(["https://gitlab.com"]);
    return StorageGetDomains();
  }
  return data.domains;
};

async function StorageUpdateDomainList(domains) {
  return browser.storage.sync.set({ 'domains': domains });
}