config.py

# Float Zoom's notifications but not all the rest
@hook.subscribe.client_managed
def managed_hook(window):
    if (
        "zoom" in window.get_wm_class()
        and window.cmd_hints()["base_width"] in [ 0, 355]
        and window.cmd_hints()["base_height"] == 0
    ):
        window.cmd_enable_floating()