我正在使用selenium来启动firefox 这是我的代码：
from selenium import webdriver
browser = webdriver.Firefox()
browser.get('http://localhost:8000')
assert 'Django' in browser.title
它工作了一会儿，然后firefox关闭，我得到这个错误：
Traceback (most recent call last):
File "functional_tests.py", line 2, in <module>
browser = webdriver.Firefox()
File "/home/hossam/anaconda3/lib/python3.5/site-packages/selenium /webdriver/firefox/webdriver.py", line 80, in __init__
self.binary, timeout)
File "/home/hossam/anaconda3/lib/python3.5/site-packages/selenium/webdriver/firefox/extension_connection.py", line 52, in __init__
self.binary.launch_browser(self.profile, timeout=timeout)
File "/home/hossam/anaconda3/lib/python3.5/site-packages/selenium/webdriver/firefox/firefox_binary.py", line 68, in launch_browser
self._wait_until_connectable(timeout=timeout)
File "/home/hossam/anaconda3/lib/python3.5/site-packages/selenium/webdriver/firefox/firefox_binary.py", line 108, in _wait_until_connectable
% (self.profile.path))
selenium.common.exceptions.WebDriverException: Message: Can't load the profile. Profile Dir: /tmp/tmp7xr9w1rw If you specified a log_file in the FirefoxBinary constructor, check it for details.
任何人都可以解释这个吗？