Just tested Trident Tor mode and its works.
Here is what you need to know to get tor working:
1 there is no tor package installed by default, so you need to install it: sudo pkg install tor
2 start tor service: sudo service tor start
3 configure your browser as in picture Falkon:
4 configure Firefox as in picture:
Now your Trident tor mode works!
Note: in tor mode you cant use pkg to install/search packages and other network tools like fetch.