I'm pretty sure the way it works is that you can't detect where a particle is exactly not because it's "always moving", it's cause it's literally impossible (since everything is a wave or something)
hopefully someone else can give a more complete answer
I hear a lot of people complaining about how they can't find stuff with Google, but it seems to work fine for me? i don't know what I'm doing differently
I use brave as well, but in my opinion Google searches work better for me? I guess I'm just more used to it or something, for some reason I find things quicker on Google and also I often rely on the search bar calculator with chrome which doesn't work as well on brave (since in order to get my answer, I have to press enter after entering in an expression. not sure if there's a way to change this)
edit note: I mostly use search engines to look up random information or for programming