Is Agent Quick Tools safe?

const rewriteUrl = () => {  const href = window.location.href;  const site = detectSite(href);            // which of the 11 sites this is  if (!site || !needsAffiliate(href, site)) return;  // not a product/registration URL, skip  const url = new URL(href);  // Is this a signup/registration flow rather than a product page?  const isSignup =    url.pathname.toLowerCase().includes("register") ||    url.searchParams.get("type")?.toLowerCase() === "register" ||    url.searchParams.get("loginstatus")?.toLowerCase() === "register";  const affCode = isSignup ? refCodes[site]?.signup : refCodes[site]?.visit;  if (!affCode) return;  // If CNFans already carries the extension's own code, don't re-process  if (site === "CNFans") {    const blockedRef = "49564";    if (url.searchParams.get("ref") === blockedRef) return;  }  // Strip any existing affiliate code and set the extension's own  applyAffiliateParams(url, affCode);  const finalUrl = url.toString();  if (finalUrl === href) return;   // nothing changed, don't touch the URL  // UsFans tracks affiliate credit server-side, so a same-document URL  // rewrite isn't enough — force one real navigation carrying the code.  if (site === "UsFans") {    const FLAG = "usfans_ref_redirected_v1";    if (sessionStorage.getItem(FLAG) === "1") return;  // already redirected once this session    const hasRef = new URL(finalUrl).searchParams.get("ref") === "RFGVYE";    if (hasRef) {      sessionStorage.setItem(FLAG, "1");      window.location.replace(finalUrl);   // real navigation, not just address-bar rewrite      return;    }  }  // All other sites: rewrite the address bar without reloading the page  window.history.replaceState({}, "", finalUrl);};

const applyAffiliateParams = (urlObj, affCode) => {  // Walk every affiliate key the extension knows about, for every site,  // and delete it from the current URL — this is what removes a  // pre-existing affiliate code, whether it's the user's own or a  // third party's, before the extension's code is applied.  Object.values(refCodes).forEach((codeObj) => {    Object.values(codeObj).forEach((code) => {      const clean = (code.startsWith("?") || code.startsWith("&")) ? code.slice(1) : code;      const params = new URLSearchParams(clean);      for (const key of params.keys()) urlObj.searchParams.delete(key);    });  });  // Now set the extension's own hardcoded code for this site/flow  const cleanAff = (affCode.startsWith("?") || affCode.startsWith("&")) ? affCode.slice(1) : affCode;  const codeParams = new URLSearchParams(cleanAff);  for (const [k, v] of codeParams.entries()) urlObj.searchParams.set(k, v);};