KTorrent (KDE) or Transmission (GNOME).

GNOME is the default on Ubuntu, Fedora and lots more. KDE is default on OpenSUSE, KDE Neon and Kubuntu.

Didn’t Waterfox get bought out by an ad company?

Firefox with Arkenfox. I’m not going to help the Chromium monopoly. The changes suck, but oh the hell well.

Edit: Switched to Librewolf because I was too lazy to reinstall Arkenfox. It’s great!