質問: self.execute(Command.NEW_SESSION, parameters) File "/anaconda3/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 320, in execute self.error_handler.check_response(response) File "/anaconda3/lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response raise exception_class(message, screen, stacktrace) selenium.common.exceptions.SessionNotCreatedException: Message: Unable to find a matching set of capabilities
回答: Firefoxを右側のファイルにドラッグしたら改善しました。