Because of an upgrade, I needed to move to new computer and new operation system so I moved my automation code to new system which is from Window 7 to Windows 8. When run the code I got the following error indicating that the Selenium can't load the profile which means that the version of the browser is not supported by the Selenium yet. If you get an error like the following one, you need to find the supported version of the browsers. Traceback (most recent call last): File "D:\workspace\ automation_project \run_test_cases.py", line 12 4, in <module> m = Markafoni(browser, server) File "D:\workspace\ automation_project \test_case.py", line 8 64, in __init__ self.driver = webdriver.Firefox() File "C:\Python27\lib\site-packages\selenium-2.25.0-py2.7.egg\selenium\webdriver\firefox\webdriver.py", line 51, in __init__ self.binary, timeout), File "C:\Python27\lib\site-packages\selenium-2.25.0-py2.7.egg\sele