Preferable a safe plugin to tor browser. HK sucks right now and I think it will only get worse.
There are no safe plugins except those that come with Tor Browser because none of the others have been tested to confirm that they are safe.
Personally, I sometimes use torsocks with wget. It's more powerful than a lot of download managers, it just has a higher learning curve. Note: I use Linux so that might not be an option for you unless you want to learn WSL or have a Mac.