Downloading Blob files from IE11
There was an issue with the download in IE11. The blob files weren't downloadable in IE11, you get a button but it doesn't do nothing when you click on it.
I have solved this problem with the following code in lufi-down.js (line 93):
if (window.navigator && window.navigator.msSaveOrOpenBlob) {
var fileName = escapeHtml(data.name);
window.navigator.msSaveOrOpenBlob(blob, fileName);
} else {
var blobURL = URL.createObjectURL(blob);
}