"""Linux (X11): the active window *title* is reachable via xdotool, but the URL
is not exposed without a browser extension or the accessibility bus. We return
None so the detector falls back to reading the address bar visually from the
screenshot, which is the portable path. (Wayland exposes neither; the app warns
about that separately.)
"""
from typing import Optional


def get_active_tab_url() -> Optional[str]:
    return None