Usually code contributions by various LLMs are easily identifiable because the agent is the author for the git commit. Mozilla on the other hand seem to be explicitly encouraging unattributed LLM code in Firefox. Also note jakearchibald, Mozillas AI spin doctor whenever devs question their intentions, lying about the reasons for this change. I think their true intentions are to muddy the waters to hide the amount of slop contributions in Firefox.
Firefox has gotten corrupted multiple times for me with normal use, to the point it wasn’t worth it. Specifically the user profile.
Ublock is great though.
use whatever you want
At one point I had programmed my own, but that was for college and I doubt it’s secure in today’s world, that was over 10 years ago.