Google Maps has been broken on Firefox for many months. Not sure if it's my personal setup, or some addon, but on every Firefox instance I have, the search is entirely broken - it won't return any results.
I've since switched over to openstreetmap.org for most of my use. It's absolutely not perfect, the search is not as powerful as Google when it comes to recognizing typos or what I'm looking for, but the actual street data is really, really good, and the map view is very uncluttered.
>but on every Firefox instance I have, the search is entirely broken - it won't return any results.
Works fine for me, with uBO and a bunch of other extensions installed. You might want to try disabling all your extensions and then re-enabling them one-by-one.
I had the same issue where even zooming was jittery and there was no StreetView, for some reason a Firefox profile reset fixed the issue. So I don't know if Google is intentionally breaking it or what.
I've since switched over to openstreetmap.org for most of my use. It's absolutely not perfect, the search is not as powerful as Google when it comes to recognizing typos or what I'm looking for, but the actual street data is really, really good, and the map view is very uncluttered.