Open blob files in Firefox not working

问题

I would open files sent from server on Firefox.

Actually it's working on IE. Here's how I proceed.

openFile(path, fileName) {
  this.creditPoliciesService
    .openFile(path)
    .toPromise()
    .then(data => {
      var blob = new Blob([data.body], { type: "application/pdf" });
      if (window.navigator && window.navigator.msSaveOrOpenBlob) { //if navigator is IE
        window.navigator.msSaveOrOpenBlob(blob, fileName);
      } else { // Mozilla case
        var fileURL = URL.createObjectURL(blob); //URL.createObjectURL takes only one parameter.
        window.open(fileURL);
      }
    });
}

When I open file I get in new tab a blob adress blob:http://localhost:4200/90907276-947a-47d8-873d-40163 with an empty page

I think I should pass file name but it's not possible with URL.createObjectURL

How can I open files in right format ?

EDIT :

• in Chrome : files get opened but without a file name at the top bar, I get "XXXXXX" instead.
• in Firefox : as mentioned I get blob address at the navigation bar with an empty page.
• in IE : it's working

来源：https://stackoverflow.com/questions/50853533/open-blob-files-in-firefox-not-working