So for WebRTC protection, I too ended up going with uBO 1.16.4.7, for the following reasons:
Been using uBO anyway
Gorhill still maintaining the legacy version (1.16.4.7 was released 2 days ago)
No need for separate WebRTC add-on
No need to modify anything to allow installation (which would need to be redone for each update)
No need to disable WebRTC entirely in about:config
Edit: I should have known this, but didn't realize it until now. If you downgrade to 1.16.4.7 you need to turn off automatic updates, or Basilisk will just re-update you to 1.17.4.