Selenium не запускает браузер - Python

Формулировка задачи:

Установил Selenium 3.0.0b3. Но до запуска браузера дело не доходит... Выдает следующее.

                    Листинг программы
                
 
                            
                        
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/selenium-3.0.0.b3-py3.4.egg/selenium/webdriver/common/service.py", line 64, in start
    stdout=self.log_file, stderr=self.log_file)
  File "/usr/lib/python3.4/subprocess.py", line 859, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.4/subprocess.py", line 1457, in _execute_child
    raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'geckodriver'
 
During handling of the above exception, another exception occurred:
 
Traceback (most recent call last):
  File "./selen.py", line 5, in <module>
    driver = webdriver.Firefox()
  File "/usr/local/lib/python3.4/dist-packages/selenium-3.0.0.b3-py3.4.egg/selenium/webdriver/firefox/webdriver.py", line 68, in __init__
    self.service.start()
  File "/usr/local/lib/python3.4/dist-packages/selenium-3.0.0.b3-py3.4.egg/selenium/webdriver/common/service.py", line 71, in start
    os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH. 
 
Exception ignored in: <bound method Service.__del__ of <selenium.webdriver.firefox.service.Service object at 0x7f3d46276cf8>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/selenium-3.0.0.b3-py3.4.egg/selenium/webdriver/common/service.py", line 163, in __del__
    self.stop()
  File "/usr/local/lib/python3.4/dist-packages/selenium-3.0.0.b3-py3.4.egg/selenium/webdriver/common/service.py", line 135, in stop
    if self.process is None:
AttributeError: 'Service' object has no attribute 'process'

Это что-то не то с "geckodriver"? Его отдельно ставить или как? Читал readme к селениуму - там ничего на этот счет не говориться. У меня стоит "Mozilla Firefox 49.0"

Решение задачи: «Selenium не запускает браузер»

textual
                            Листинг программы 
                        
 
                        
                          
                    
#! /usr/bin/python3
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
 
driver = webdriver.Firefox()
driver.get("http://www.python.org")
assert "Python" in driver.title
elem = driver.find_element_by_name("q")
elem.clear()
elem.send_keys("pycon")
elem.send_keys(Keys.RETURN)
assert "No results found." not in driver.page_source
driver.close()