Yeah, It doesn't open any pages.
Only settings, history, & Info. Only downloaded 1 xxx it couldn't find 2nd video that was playing. Useless.

Firefox Mobile crashes when I try to download a video from a RedLib instance.

It works, but it's malware. Redirect websites like iherb and ebay somewhere else

Keine Ahnung was an dem Downloader Smart sein soll. Er reagiert auf keiner einzigen von mir getesteten Webseite. Er findet einfach keine Videofiles. Somit is er aus meiner Sicht durchgefallen.

Does not work with Youtube and XXX websites

Не работает.
Not working.

does not work with youtube

После установки нет ни малейшего намёка на то, как именно скачивать видео. Ни на одном сайте нет ни кнопок, ни меню, ничего.