Is Pop up blocker for Chrome™ - Poper Blocker safe?

// FrfRC.uDa: remote config fetcher moduleFrfRC.uDa = {  init: function(deps) {    const module = FrfRC.uDa;    const storage = deps.instance;  // FVK storage helper    module.class = class uDa {      // Called on startup — begins the 60-second polling loop      startPolling() {        this.fetchAndApply();        setInterval(() => { this.fetchAndApply(); }, 60000); // every 60 seconds      }      // Core polling step: check if refresh needed, then fetch      async fetchAndApply() {        if (await this.shouldRefresh()) {          try {            const config = await this.fetchConfig();            if (config) {              await storage.storeConfig(config);   // save to chrome.storage.local              this.dispatchConfigEvent(config);    // notify other modules via 'olyIG' event            }          } catch (e) { /* silent failure */ }        }      }      // Broadcast config to other FrfRC modules via CustomEvent      dispatchConfigEvent(config) {        const ev = new Event('olyIG');        ev.config = config;        self.dispatchEvent(ev);      }      // Fetch config from server using hardcoded session ID      async fetchConfig() {        const resp = await fetch('https://api2.poperblocker.com/content/config', {          method: 'POST',          body: JSON.stringify({ sid: 'aeb204c39' })  // hardcoded — same for all users        });        if (resp.status === 200) return await resp.json();        return null;      }      // Returns true if config is stale (older than 6 hours) or missing      async shouldRefresh() {        if (!await storage.isLoggedIn()) return await storage.isGuestAllowed();        const lastFetch = await storage.getLastFetchTime();        return Date.now() - lastFetch > 21600000; // 21600000ms = 6 hours      }    };    module.instance = new module.class;    module.instance.startPolling();  },  deps: ['FVK']};

// ZsA module: version-based config refresh — fetches /version/config 3.3s after startupasync fetchVersionConfig() {  const DELAY_MS = 3310;  await new Promise(resolve => setTimeout(resolve, DELAY_MS));  if (!await this.isCacheValid()) {    const resp = await fetch('https://api2.poperblocker.com/version/config', {      method: 'POST',      headers: { 'Content-Type': 'application/json', 'Accept': 'application/json' },      body: JSON.stringify({        sid: 'aeb204c39',  // hardcoded session ID, same for all users        hash: currentHash  // hash of currently cached config      })    });    const newConfig = await resp.json();    if (typeof newConfig === 'object' && Object.keys(newConfig).length) {      await this.saveConfig(newConfig);  // stored as 'priority_block_selectors' in chrome.storage.local    }  }}

// Wr.Rotate: ROT47 cipher — used to encode the browsing-history POST bodyWr.Rotate = class {  // 94 printable ASCII characters in order (the rotation alphabet)  static get map() {    return '!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~';  }  // Entry point: JSON-serialise the payload then ROT47-encode it  static rotate(obj) {    if (this.isEmpty(obj)) throw new Error();    return this.rot47(JSON.stringify(obj));  }  // Rotate each printable character by 47 positions within the 94-char alphabet  static rot47(str) {    let result = '';    const mapLen = this.map.length; // 94    for (let i = 0; i < str.length; i++) {      const ch = str.charAt(i);      const idx = this.map.indexOf(ch);      result += idx >= 0 ? this.map.charAt((idx + mapLen / 2) % mapLen) : ch;    }    return result;  }  // Guard: reject null/empty inputs before encoding  static isEmpty(val) {    if (val == null) return true;    if (val.length > 0) return false;    if (val.length === 0) return true;    if (typeof val !== 'object') return true;    for (var k in val)      if (Object.prototype.hasOwnProperty.call(val, k)) return false;    return true;  }};

// ClaudeNetwork (runs on claude.ai). Returns the element if it matches// any selector in the server-delivered filterPost list.getPostContentElements = (el) => {  if (!(el instanceof HTMLElement)) return null;  const selectors = this.socialConfig.querySelectorsOffsetData.filterPost; // from api2.poperblocker.com  return selectors.some(sel => el.matches(sel)) ? [el] : null;};

// SocialNetworkManager.tryBlockContent (shared by claude.ai and google.com).// Reads the page element, checks it against the remote selectors, then// counts the match.tryBlockContent = async (el) => {  const matched = this.socialNetwork.getPostContentElements(el);  if (matched && KeywordStore.shouldBlock(matched) && this.socialNetwork.isMainFeed(el)) {    this.socialNetwork.hidePost(el, true, Feature.SOCIAL_CONTENT_BLOCKER);  }};