1338770 - WEBEXTENSION browser.downloads.download Failed - Blob resource Firefox 51.0.1

Status: RESOLVED DUPLICATE of bug 1331176

(WebExtensions :: Untriaged, defect)

Description

[tbt43p]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:51.0) Gecko/20100101 Firefox/51.0
Build ID: 20170201180315

Steps to reproduce:

Wrote an add-on to help saving the title of a tab, url of tab and a user comment of the webpage into a file.

wrote this code

function salva()
{
	var comment = document.getElementById('COMMENT').value;
	var titolo=document.getElementById('TITLE_TAB').value;
	var indirizzo=document.getElementById('URL_TAB').value;
	var textToSave = "<TITLE>" + titolo + "</TITLE>"  + "<COMMENT>" + comment + "</COMMENT>" + "<LINK>" + indirizzo + "</LINK>" + "\n"; 
	///*
	browser.downloads.download({
								url: URL.createObjectURL(new Blob([ textToSave ])),
								filename: "testff.txt",
								})
	//*/
	/*							
	var blob = new Blob([ textToSave ], {
    type: 'text/plain'
	});
	var url = URL.createObjectURL(blob);
	browser.downloads.download({
		url: url,
		filename: 'filejjjjj.txt'
});
*/

var blob = new Blob(['text'], {
    type: 'text/plain'
});
var url = URL.createObjectURL(blob);
browser.downloads.download({
    url: url
});
}

They are three snippet (two are commented out) I found to get my work done, but no one works, keeps sayind failed - blob resource.

Working on Ubuntu 16.04 64 bit, Firefox 51.0.1 64 bit.
Thanks


Actual results:

Download failed - blob resource


Expected results:

My extension should have downloaded the file.
My question on StackOverflow for reference:

http://stackoverflow.com/questions/42169569/javascript-download-an-on-the-fly-generated-blob-file-into-specific-folder