FileZilla has a long history with bundling spyware/adware with their primary installers. If you are looking for alternatives, check out Cyberduck.
https://en.wikipedia.org/wiki/FileZilla#Bundled_adware_issue...
https://en.wikipedia.org/wiki/FileZilla#Bundled_adware_issue...
I'm interested in finding a replacement for FileZilla that works on Linux as well, ideally with data import (having tens of connections saved).
They're available on Windows via WSL, or probably natively on Mac (I assume Homebrew has them if not).