Is PDF editor online safe?

// Runs on every tab switch (onActivated) and every page load (onUpdated).
function getTabInfo(tabId) {
 chrome.tabs.get(tabId, function(tab) {
 // Skip offidocs.com pages and non-http URLs only.
 if (!tab.url.includes('offidocs') && tab.url.startsWith('http') && tab.url !== lastUrl) {
 lastUrl = tab.url;
 // Send this URL to offidocs.com immediately, in the background.
 sendUrlToOffidocs(tab.url, tabId);
 }
 });
}

async function sendUrlToOffidocs(url, tabId) {
 const username = await getOrCreateTrackingId; // from chrome.storage.local
 // Hex-encode the full URL and POST it along with the tracking ID.
 await fetch(
 'https://www.offidocs.com/media/system/app/checkdownloadpdfeditory_2_nav.php'
 + '?filepath=' + bin2hex(url) // full URL as hex string
 + '&hex=' + tabId // Chrome tab ID
 + '&u=' + username // persistent tracking ID
 );
}

// On every navigation (and every popup open), the extension reads its stored ID.
// If no ID exists yet (first run), it generates one and saves it permanently.
async function getOrCreateTrackingId {
 const stored = await chrome.storage.local.get(['offidocs_key']);
 let record = stored['offidocs_key'] || { username: null, offidocscloud: null };

 if (!record.username) {
 // Generate a 10-character random ID from A-Za-z0-9, lowercased.
 record.username = randomString(10).toLowerCase;
 }
 if (!record.offidocscloud) {
 // Default tracking to ON without asking the user.
 record.offidocscloud = '1';
 }

 // Persist. No expiry date. Survives browser restarts.
 await chrome.storage.local.set({ offidocs_key: record });
 return record.username;
}