Rated 5 out of 5 stars

The best extension. Unfortunately latest "Quantum bullshit" Mozilla break it, so you need to downgrade version (for example to 52.0.2)
And i did a downgrade just to use it!
https://ftp.mozilla.org/pub/firefox/releases/
and update plugin (addons - plugin - more - reviews - Downthemall - See all versions)

This review is for a previous version of the add-on (3.0.8).