Is Smart Adblocker safe?

// D() = chrome.storage.session.get(key)
// F() = chrome.storage.session.set({key: value})

async function getTabReferrer(tabId) {
  const referrers = await sessionGet('referrers') || {};
  referrers[tabId] = referrers[tabId] || {};
  return referrers[tabId];
}

// Inside onTabUpdated(tabId, tab):
const tabReferrer = await getTabReferrer(tabId);
const previousUrl = tabReferrer?.url;   // undefined on first navigation

const payload = base64Encode({
  url: tab.url,
  userId,
  dr: previousUrl,  // sent as the 'document referrer'
  plt: 0,
  bc: blockedCount,
  ts: Date.now()
});

// After POST: store current URL as referrer for the NEXT navigation
const referrers = await sessionGet('referrers') || {};
referrers[tabId] = { url: tab.url };
await sessionSet('referrers', referrers);

// tn() = btoa(unescape(encodeURIComponent(JSON.stringify(data))))
// Qe = "https://smartadblocker.com/extension/rules/api/v2"

async function onTabUpdated(tabId, tab) {
  const eulaAccepted = await getEulaAccepted();          // tt()
  const userId = await localGet("userId");               // f()
  const tabReferrer = await getTabReferrer(tabId);       // ln()
  const previousUrl = tabReferrer?.url;

  if (tab.url && tab.url.startsWith("http")) {
    const blockedCount = await getBadgeCount(tabId);     // z()
    const encodedPayload = base64Encode({
      url: tab.url,
      userId,
      dr: previousUrl,
      plt: 0,
      bc: blockedCount,
      ts: Date.now()
    });
    const enhancedProtection = await localGet("enhancedProtection");
    if (encodedPayload && eulaAccepted && enhancedProtection === true) {
      const response = await postJSON(RULES_API_URL, { payload: encodedPayload });
      if (response?.rules) await applyDynamicRules(response.rules);
    }
    // Always update the referrer for next navigation
    const referrers = await sessionGet("referrers") || {};
    referrers[tabId] = { url: tab.url };
    await sessionSet("referrers", referrers);
  }
}

// f() = chrome.storage.local.get(key)
// G() = chrome.storage.local.set({key: value})

async function initializeUserId() {
  const existingId = await localGet('userId');
  if (existingId) return existingId;          // reuse existing — never regenerates
  const newId = crypto.randomUUID();
  await localSet('userId', newId);
  return newId;
}

// Called from both:
//   chrome.runtime.onInstalled (line 1438)
//   chrome.runtime.onStartup   (line 1471)