Bunch downloading torrent files

ok, i usually get a big bunch of .torrent files once a month, run a short filtering and dump them all into transmission on a seedbox.

this worked fine with firefox and downthemall extension. however probably due to ff permanent and non stoppable upgrading the extension no longer works. while trying to figure it out i thought that maybe there are other/better ways. so, if you bulk download how have you organised it?

i still want to

get the files as search results (according to searcf filters),

be able to get rid of duplicates (which are renamed like filex(1).torrent so easily to be found and removed)

and have a look at them before handing them off to transmission

what would you suggest?

os is win10