Help for web.cookies.update_mask_on_cookie_change

def update_mask_on_cookie_change():
    """
    Called when any cookie is set or removed, to update the mask record (if any) in masks.cdv.
    """
    mask = get("mask")
    if mask:
        norm = _normalize_mask(mask)
        if not norm:
            return
        mask_map = _read_masks()
        current = {k: v for k, v in _get_current_cookies().items() if k not in ("mask", "cookies_accepted")}
        mask_map[norm] = current
        _write_masks(mask_map)