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Straight up doesn't do shit

This add-on supercharges Firefox's built-in download manager by enabling multi-threading support. With no additional software required and a robust set of options, this add-on is fantastic. Thanks to the developer!

It's good but fails for very large files, ie 20GB or more. After the download, firefox starts saving it, but it gets stuck halfway.

Works perfect

This is a very good extension, it's very useful and can increase the download speed by a lot!
这是个非常好的拓展，它十分实用，可以让下载速度提升非常之多！
この拡張機能はとても便利で、ダウンロード速度を大幅に向上させることができる！

A great extension - well thought out and functional! Very low CPU load - well done!

It's a pity that it asks about the location of the files at the end, instead of at the beginning of the download, but this limitation results from the limitations of Firefox itself, as I guess (removal of the "IDBMutableFile" functionality in Firefox version 75).

The choice of download folder is a joke. It still downloads the file to the browser cache directory and then it just moves it to the user-selected folder. In other words, trash.

I think you should update your addon, it is getting a few bugs with newer Firefox, thanks.

"Failed to save" .. anytime I tried downloading anything.

的确多线程，可是下载也慢，合并也慢……

For some weeks now the extension stopped working for me.
It will only use 1 thread, despite being set to use more, and it will always stop with an error before completing the download.