Selenium: FirefoxProfile exception Can't load the profile

Per this previous question I updated Selenium to version 2.0.1 But now I have another error, even when the profile files exist under /tmp/webdriver-py-profilecopy:

  File "/home/sultan/Repository/Django/monitor/app/request.py", line 236, in perform
    browser = Firefox(profile)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 46, in __init__
    self.binary, timeout),
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/extension_connection.py", line 46, in __init__
    self.binary.launch_browser(self.profile)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 44, in launch_browser
    self._wait_until_connectable() 
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 87, in _wait_until_connectable
    raise WebDriverException("Can't load the profile. Profile Dir : %s" % self.profile.path)
selenium.common.exceptions.WebDriverException: Can't load the profile. Profile Dir : /tmp/webdriver-py-profilecopy

What is wrong? How can I resolve this issue?

Update:

Selenium team fixed in latest version. For almost all environments the fix is:

pip install -U selenium

Unclear at which version it was fixed (apparently r13122), but certainly by 2.26.0 (current at time of update) it is fixed.

This error means that _wait_until_connectable is timing out, because for some reason, the code cannot connect to the webdriver extension that has been loaded into the firefox.

I have just reported an error to selenium where I am getting this error because I'm trying to use a proxy and only 2 of the 4 configured changes in the profile have been accepted by firefox, so the proxy isn't configured to talk to the extension. Not sure why this is happening...

https://github.com/seleniumhq/selenium-google-code-issue-archive/issues/2061

I had the same issue after upgrading Ubuntu to 12.04.

The issue was on the package side and has been fixed in the latest version of the library. Just update the selenium library. For almost all Python environments this is:

pip install -U selenium

I faced the same problem with FF 32.0 and Selenium selenium-2.42.1-py2.7.egg. Tried to update selenium, but it is already the latest version. The solution was to downgrade Firefox to version 30. Here is the process:

#Download version 30 for Linux (This is the 64 bit)
wget http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/30.0/linux-x86_64/en-US/firefox-30.0.tar.bz2

tar -xjvf firefox-30.0.tar.bz2
#Remove the old version
sudo rm -rf /opt/firefox*
sudo mv firefox /opt/firefox30.0
#Create a permanent link
sudo ln -sf /opt/firefox30.0/firefox /usr/bin/firefox

This solved all the problems, and this combination works better !