PIA is the best for torrents. It is $79 for 39 months which is $2.03/mo and they have port forwarding. That’s less than half of pretty much every other provider.
I have had 3 clients (one for a specific tracker, one for everything else, and an extra seedbox) going 24/7 for years with no problems. No complaints about the speeds either. I frequently saturate full gigabit on both downloads and uploads.
You just reminded me there actually was a browser called Torch that could download torrents like a normal download. It was basically just Chrome with a built-in torrent client.
I remember trying it out when it first came out in 2012. It never caught on and looks like the last release was in 2020.