Some old versions of Opera from over a decade ago supported downloading torrents. It sadly didn't catch on.
Re:0 A.D. Alpha 25: Yaunā
by kQq9oHeAz6wLLS on Sunday August 08, 2021 @02:51PM
(#28109126)
> I long for the day when the browser speaks it natively
Brave browser
I like both the tone and the content of the torrent FAQ page they made, too: https://play0ad.com/download/bittorrent-faq/