とても便利に使っています。操作も簡単です。

Great Add-on!

It's worked, at least for Youtube and many sites.
But took a lot of memory, especially for some site that generates a lot of mini audio files (like as Duolingo) over usage time.

4 GB memory just for this addons, forced me to temporary disabled it.

It'll be better if garbage collection and automatic RAM release at fixed/set times are integrated into the addon.

使えます

Little trouble getting the companion app to work. Other than that happy with the app, easy to use and downloads most videos which is great because my internet is usually sketchhy. Note: if your download fails delete the incomplete file reload the page and start download again helps.

操作も簡単でとてもわかりやすく直ぐに使えます

Great add-on, I use it when I want to grab a video from my browser.
Works great, except for accepting prepaid credit cards to buy a subscription. Since my prepaid credit card was not accepted I am still living with the barcodes in the corner.
I'll check periodically just in case they will take my cc ( 4 stars as unable to get rid of barcodes )

Satisfied, still to improve.

It does what it claims, but more is expected from the big boy on the block. How about adding the ability to resume downloads following a connection loss?