AngularJs:在Firefox中无法下载XML文件

var xmlData = "<xml>...</xml>";
var blob = new Blob([xmlData], { type: "text/xml" });
var url = URL.createObjectURL(blob);
var link = document.createElement("a");
link.href = url;
link.download = "file.xml";
link.click();

<script src="https://cdn.jsdelivr.net/npm/file-saver@2.0.5/dist/FileSaver.min.js"></script>

var xmlData = "<xml>...</xml>";
var blob = new Blob([xmlData], { type: "text/xml" });
saveAs(blob, "file.xml");

var express = require("express");
var app = express();

app.get("/download", function(req, res) {
  var xmlData = "<xml>...</xml>";
  res.set("Content-Disposition", "attachment; filename=file.xml");
  res.set("Content-Type", "text/xml");
  res.send(xmlData);
});

app.listen(3000, function() {
  console.log("Server is running on port 3000");
});