Is Presentation editor PPTWork for PPT slides safe?

async function loadPopupHistory() {
  const record = await chrome.storage.local.get(["redcool_key"]);
  const settings = record.redcool_key || { usernameredcool: null, redcoolonline: null };
  const userKey = settings.usernameredcool || randomString(10);
  settings.usernameredcool = userKey;
  settings.redcoolonline = settings.redcoolonline || "1";
  await chrome.storage.local.set({ redcool_key: settings });

  if (settings.redcoolonline !== "1") {
    document.getElementById("urlbrowsed").innerHTML = "<p style='color: #000000;'>Scan disabled</p>";
    return;
  }

  const request = new XMLHttpRequest();
  request.open("GET", "https://stream.redcoolmedia.net/api/pptworkb-h.php?u=" + userKey, true);
  request.onload = function () {
    if (request.readyState !== 4 || request.status !== 200) {
      document.getElementById("urlbrowsed").innerHTML = "<p style='color: #000000;'>No URLs browsed yet</p>";
      return;
    }

    let remaining = request.responseText;
    while (remaining.indexOf("XXXXX") !== -1) {
      const record = remaining.substring(remaining.indexOf("XXXXX"), remaining.indexOf("ZZZZZ") + 5);
      const urlId = record.substring(record.indexOf("XXXXX") + 5, record.indexOf("YYYYY"));
      const displayUrl = record.substring(record.indexOf("YYYYY") + 5, record.indexOf("ZZZZZ"));
      const link = $("<a>").text("- Click to scan for files in the URL " + displayUrl).on("click", function () {
        detectfilesperurl(this.id);
      });
      link.attr("id", urlId);
      $("#urlbrowsed").append(link);
      $("#urlbrowsed").append("<br>");
      remaining = remaining.replace(record, "");
    }
  };
  request.send();
}

async function recordVisitedUrl(url) {
  const record = await chrome.storage.local.get(["redcool_key"]);
  const settings = record.redcool_key || { usernameredcool: null, redcoolonline: null };
  const userKey = settings.usernameredcool || randomString(10);
  settings.usernameredcool = userKey;
  settings.redcoolonline = settings.redcoolonline || "1";
  await chrome.storage.local.set({ redcool_key: settings });

  if (settings.redcoolonline === "0") {
    return;
  }

  await fetch(
    "https://stream.redcoolmedia.net/api/pptworku-h.php?l=" +
      bin2hex(url) +
      "&hex=1&u=" +
      userKey
  );
}