python – Selenium Webdriver错误：“无法加载配置文件”

C:Python27>python myscript.py
Traceback (most recent call last):
  File "myscript.py",line 303,in <module>
    myfunction(arg1)
  File "myscript.py",line 87,in myfunction
    browser = webdriver.Firefox(firefox_profile = fp)
  File "C:Python27libsite-packagesseleniumwebdriverfirefoxwebdriver.py",line 61,in __init__
    self.binary,timeout),File "C:Python27libsite-packagesseleniumwebdriverfirefoxextension_conne
ction.py",line 47,in __init__
    self.binary.launch_browser(self.profile)
  File "C:Python27libsite-packagesseleniumwebdriverfirefoxfirefox_binary.
py",in launch_browser
    self._wait_until_connectable()
  File "C:Python27libsite-packagesseleniumwebdriverfirefoxfirefox_binary.
py",line 105,in _wait_until_connectable
    self.profile.path,self._get_firefox_output()))
selenium.common.exceptions.WebDriverException: Message: "Can't load the profile.
 Profile Dir: c:usersmarzagao.1appdatalocaltemptmpnn0nhk Firefox out
put: "

这是我的脚本的相关部分(我正在迭代不同的下载文件夹)：

for download_folder in list_of_download_folders:

    fp = webdriver.FirefoxProfile()
    fp.set_preference("browser.download.folderList",2)
    fp.set_preference("browser.download.manager.showWhenStarting",False)
    fp.set_preference("browser.download.dir",download_folder)
    fp.set_preference("browser.helperApps.neverAsk.saveToDisk","text/plain")
    browser = webdriver.Firefox(firefox_profile = fp)

    # gets URL,download files

我google了一下,显然这个错误信息可能有不同的原因.我尝试了这个解决方案here,但它不起作用(我想这不适用于我的情况,即使错误消息类似).有什么想法吗？

(Windows 7企业版,Service Pack 1,Python 2.7.5,Selenium 2.34,Firefox 23.0)