When I've used it, it has been extremely helpful and time saving.

Very confident and efficient

used for sometime, recently it reset the download and restart from beginning on a large file which made me frustrated. it doesn't split the file and do multi-threaded downloaded.

actually does what it claims, which is exceptionally rare, especially for an addon of this type

I do not know how to use

On a page of archive.org links direct to mp3 files, it sees not one of them. It has no way to define the download directory or choose each time.