Firefox 63 cannot start

[ZeroTworu]

After update Firefox to 63 cannot start webdriver, error: Arsenic version 1.0.0.dev8

  File "/home/art/venvs/worker/lib/python3.6/site-packages/arsenic/__init__.py", line 29, in start_session
    return await driver.new_session(browser, bind=bind)
  File "/home/art/venvs/worker/lib/python3.6/site-packages/arsenic/webdriver.py", line 57, in new_session
    raise SessionStartError(err_resp['error'], err_resp.get('message', ''), original_response)
arsenic.errors.SessionStartError: unknown error: newSession

In original selenium 3.14.1 i see same error:

~lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py in execute(self, driver_command, params)
    319         response = self.command_executor.execute(driver_command, params)
    320         if response:
--> 321             self.error_handler.check_response(response)
    322             response['value'] = self._unwrap_value(
    323                 response.get('value', None))

~lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py in check_response(self, response)
    240                 alert_text = value['alert'].get('text')
    241             raise exception_class(message, screen, stacktrace, alert_text)
--> 242         raise exception_class(message, screen, stacktrace)
    243 
    244     def _value_or_default(self, obj, key, default):

WebDriverException: Message: newSession

[tarekziade]

This could be an obsolete geckodriver. Make sure you try with the latest release