Rated 4 out of 5 stars

by snuk182 on Aug. 12, 2017 ·

Firefox disabled Torrent Tornado as legacy and unsupported.
https://support.mozilla.org/en-US/kb/firefox-add-technology-modernizing?as=u&utm_source=inproduct

This review is for a previous version of the add-on (2.21). 

by Oleksandr (Developer) on Aug. 14, 2017 ·

The new WebExtensions API does not support working with files and does not support udp / tcp
Torrent Tornado (like all other XUL add-ons) will die in November 2017, after the release of Firefox 57
To continue using it, I recommend installing Firefox ESR or Pale Moon