Is DS Amazon Quick View Extended safe?

var Gumroad = function() {
  var e = "",
    r = 0,
    t = "",
    o = {},
    n = function(e) {
      chrome.storage.local.get("gumroad", (function(e) {
        e.gumroad && (r = e.gumroad.ts, o = e.gumroad.res, t = e.gumroad.key)
      }))
    },
    a = function(r) {
      return new Promise((function(t, o) {
        r || o({
          error: !0,
          data: "No license key specified"
        }), e || o({
          error: !0,
          data: "Empty product id"
        });
        fetch("https://dmitry.artamoshkin.com/ds/license.php", {
          method: "POST",
          mode: "cors",
          body: new URLSearchParams({
            license_key: r
          })
        }).then((function(e) {
          if (!e.ok) throw e;
          return e
        })).then((function(e) {
          return e.text()
        })).then((function(e) {
          console.log(e);
          try {
            json = JSON.parse(e)
          } catch (e) {
            json = response
          }
          var o = s(json, r);
          t(o)
        })).catch((function(e) {
          if ("object" == typeof e && e.message) o({
            error: !0,
            data: e.message
          });
          else if ("object" == typeof e && e.status) {
            var r = {
              error: !0,
              data: "Error: " + e.status + " " + e.statusText
            };
            o(r)
          }
        }))
      }))
    },
    s = function(e, n) {
      if (!e.success) return {
        error: !0,
        data: e.message
      };
      var a = {
        error: !1,
        data: e
      };
      return function(e, n) {
        r = Date.now(), o = n, t = e, chrome.storage.local.set({
          gumroad: {
            ts: r,
            res: o,
            key: t
          }
        })
      }(n, a), a
    };
  return {
    init: function(r) {
      r.productId && (e = r.productId), n()
    },
    get: function(e) {
      return Date.now() - r < 1728e5 && e === t ? Promise.resolve(o) : a(e)
    },
    verify: a
  }
}();

      u = function() {
        chrome.tabs.query({}, (function(t) {
          for (var i = 0, a = t.length; i < a; i++) chrome.tabs.sendMessage(t[i].id, {
            cmd: "app.update_state",
            data: {
              state: e,
              license: r,
              settings: n
            }
          }, (function(e) {}))
        }))
      },