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I have such code snippet that used to be work with the previous versions of Google Chrome, but now it does not work. When I run this script I redirected to the page with the content of the file(it's a text) and with AWS URL(the same as in setAttribute).

var element = document.createElement('a');
element.setAttribute('href', 'https://s3-us-east-1.amazonaws.com/XXX/XXX/XXX?Signature=XXX&Expires=XXX&AWSAccessKeyId=XXX');
element.setAttribute('download', 'filename.txt');
document.body.appendChild(element);
element.click();

How to download this file?

I made an error in the comments.
Chrome still favours download attribute, but it completely ignores it if the anchor element has cross origin attributes ( meaning, if the file is hosted on a different domain).

To be able to download it, file needs to be served with header: Content-Disposition: attachment;

Check this tutorial to see how to set Content-Disposition in s3 management console: http://iwantmyreal.name/s3-download-only-presigned-upload

Here is my solution:

 let downloadImage = url => 
 let urlArray = url.split("/")
 let bucket = urlArray[3]
 let key = `$urlArray[4]/$urlArray[5]`
 let s3 = new AWS.S3( params: Bucket: bucket )
 let params = Bucket: bucket, Key: key
 s3.getObject(params, (err, data) => 
 let blob=new Blob([data.Body], type: data.ContentType);
 let link=document.createElement('a');
 link.href=window.URL.createObjectURL(blob);
 link.download=url;
 link.click();
 )
 

The url parameter refers to the full url of the image.