Is Crystal safe?

// Built into the extension — applied only when the remote fetch throws
const FALLBACK_WA_SELECTORS = {
  linkedInInlineSelector: [".msg-convo-wrapper.msg-thread..."],
  linkedInEditableDivSelector: [".msg-form__contenteditable..."],
  linkedInPopupSelector: [".msg-convo-wrapper.msg-overlay-conversation-bubble..."]
};
this.waSelectors = FALLBACK_WA_SELECTORS; // overwritten on initialize()

async fetchWASelectors() {
  try {
    const resp = await fetch(
      `https://crystal-cdn.s3.amazonaws.com/linkedin_wa/config.json?v=${Date.now()}`
    );
    // Returns { elements: { linkedInInlineSelector: [...], linkedInEditableDivSelector: [...], ... } }
    return (await resp.json()).elements;
  } catch {
    return false; // falls back to hardcoded JF selectors
  }
}

// Content script sends a message; background SW makes the authenticated API call
const fetchProfileSelectors = () =>
  new Promise(async resolve => {
    chrome.runtime.sendMessage({ type: 'GET_SELECTORS', appName: ..., selectorClass: ... }, result => {
      resolve(result);
    });
  });

// Handles the GET_SELECTORS message from the content script
case 'GET_SELECTORS':
  return getAuthTokens().then(tokens => {
    buildApiClient(tokens).get('/selectors')
      .then(r => r.json())
      .then(data => respond(data))
      .catch(() => respond(null));
  }), true;

this.scrape = async callback => {
  const profileElements = await this.getProfileElements();
  if (!this.getProfileQuery(profileElements)) return false;

  let scraper;
  if (isSalesNavigatorProfile()) {
    // Fetches linkedin/config.json from S3 for Sales Navigator selectors
    this.linkedinScrapeConfig = await this.fetchLinkedinSelectors();
    scraper = new SalesNavigatorScraper(this.linkedinScrapeConfig.salesNavigator);
  } else if (this.isRecruiterProfile()) {
    scraper = new RecruiterScraper();
  } else if (isTalentProfile()) {
    scraper = new TalentScraper();
  } else {
    // Uses this.selectors — the remotely-fetched set from /v3/selectors
    scraper = new StandardScraper(this.selectors);
  }

  const scraped = await scraper.scrape();
  // Sends result to crystalknows.com API for personality prediction
  chrome.runtime.sendMessage(buildProfileQuery(scraped));
};