This one looks like idm very much,but it's free! Really nice.

아주 좋소

This has become one of my fav add-on. Works as expected. Thank you!

I was skeptical of how the download speeds would differ from the defaults in Firefox, but WOW did this shock me... BLAZING FAST SPEEDS.

Incredible extension, so much so that I'd happily pay for it. Bravo, Jungyu.

One of the best download manager. I was downloading a file with 340 - 120 KB/s. And with this extension I was downloading with a speed of 3MB/s.
Es una extensión realmente útil. Ayuda mucho.

Easily the most polished DL Manager. 10/10!

靠谱，简约，方便~

the dummys who limit the download speed will now cry >:)

Exactly what the doctor ordered. This is the right stuff. Nicely done. Thank you!