path: mozjs128_128.14.0-3/testing/mozbase/mozdevice/mozdevice/adb.py
        if self._have_pidof:
            try:
                pid_output = self.shell_output("pidof %s" % app_name, timeout=timeout)
                re_pids = re.compile(r"[0-9]+")
                pids = re_pids.findall(pid_output)