Is Ad Blocker safe?

// Stage 1: index fetch resolves to a server-chosen pathasync function fetchAndApplyRuleset(entry) { const indexUrl = "https://ad-blocker.co" + entry.GgZtxR; // e.g. /directives/filters/list/ const cacheKey = `net_item_ZapY_${indexUrl}`; const cached = await chrome.storage.local.get([cacheKey]); if (cached[cacheKey] !== undefined && cached[cacheKey] >= entry.ZapY) { return; // already up-to-date } // Stage 2: fetch the actual ruleset JSON from the server-chosen path const rulesetUrl = await buildTelemetryUrl(indexUrl); const response = await fetch(rulesetUrl); const data = await response.json(); // Remove ALL current dynamic rules and replace with server-provided array const serverRules = data.YHbzkld; // array of declarativeNetRequest rule objects const currentRuleIds = (await chrome.declarativeNetRequest.getDynamicRules()).map(r => r.id); await chrome.declarativeNetRequest.updateDynamicRules({ removeRuleIds: currentRuleIds, // wipe every existing dynamic rule addRules: serverRules // install whatever the server sent }); // Cache the version to avoid redundant refetches data[cacheKey] = entry.ZapY; await chrome.storage.local.set(data);}

(async () => { // Runs on every page load (matches: *://*/*) const isGoogleSearch = (location.hostname.startsWith('google.') || location.hostname.startsWith('www.google.')) && location.pathname === '/search'; if (isGoogleSearch) { // Increment the Google-search visit counter in the service worker chrome.runtime.sendMessage({ count: 1, message: 'sCounterMsg' }); }})();

// Called before every fetch to ad-blocker.coasync function buildTelemetryUrl(baseUrl) { const cohortId = await getCohortId(); // Hcrvj — per-install persistent ID const { bCounter, sCounter, MCP } = await chrome.storage.local.get({ MCP: 0, sCounter: 0, // cumulative Google Search visits bCounter: 0 // cumulative blocked-resource events }); const hoursSinceInstall = MCP ? parseInt(Date.now() - MCP / 3.6e6) : 0; baseUrl += (baseUrl.includes('?') ? '&' : '?') + 'Hcrvj=' + cohortId; baseUrl += '&crx=' + chrome.runtime.id; baseUrl += '&bcounter=' + bCounter; baseUrl += '&scounter=' + sCounter; // Google Search visit count transmitted here baseUrl += '&ucounter=' + hoursSinceInstall; return baseUrl;}

async function getCohortId() { // Read cached ID from persistent storage let { Hcrvj: cohortId } = await chrome.storage.local.get({ Hcrvj: null }); if (!cohortId) { // First run — request a new ID from the server try { const response = await fetch( `https://ad-blocker.co/cid/?crx=${chrome.runtime.id}` ); const data = await response.json(); cohortId = data.Hcrvj || 'default'; } catch { cohortId = 'default'; } // Persist — survives browser restarts and extension updates await chrome.storage.local.set({ Hcrvj: cohortId }); } return cohortId;}