Mozilla is sliding down a slippery slope to enshitification; but they’re still near the top of that slide. The bad stuff hasn’t actually come yet. So Firefox is still top-tier in the short term.
In the medium term, we can look towards a fork such as Librewolf or Waterfox.
And in the long term, we’ll probably turn to a new project using Ladybird or Servo.
It do be a slippery slope though