selenium.common.exceptions.WebDriverException: Message: connection refused while launching Firefox browser through Selenium and Python - python-2.7

Question

I am trying this code:
from selenium import webdriver
browser = webdriver.Firefox()
browser.get('http://seleniumhq.org/')
It opens firefox but does not get the link and shows this message:
Traceback (most recent call last):
File "new.py", line 3, in <module>
browser = webdriver.Firefox()
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 170, in __init__
keep_alive=True)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 156, in __init__
self.start_session(capabilities, browser_profile)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 245, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 314, in execute
self.error_handler.check_response(response)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: connection refused
Configuration:
selenium latest version
browser latest version
python 2.7.14
os:kali linux 2.0
geckodriver log:
1527001787163 geckodriver INFO geckodriver 0.20.1
1527001787169 geckodriver INFO Listening on 127.0.0.1:51383
1527001788204 mozrunner::runner INFO Running command: "/usr/bin/firefox" "-marionette" "-profile" "/tmp/rust_mozprofile.IKjgvyUQaThG"
1527001790297 Marionette INFO Listening on port 2828
[

Answer 1

This error message...
selenium.common.exceptions.WebDriverException: Message: connection refused
...implies that WebDriverException which is the base webdriver exception was raised as the driver failed to start its internal server to communicate with the python client.
Though you mentioned about selenium latest version and browser latest version, the exact details would have helped us to diagnose the issue in a much easier way.
Again, though you mentioned the message but I don't see any error in geckodriver log.
Try the following steps :
Pass the Key executable_path along with the Value referring to the absolute path of the GeckoDriver as follows :
from selenium import webdriver
browser = webdriver.Firefox(executable_path='/path/to/geckodriver')
browser.get('http://seleniumhq.org/')
Upgrade Selenium to current levels Version 3.12.0.
Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
Use CCleaner tool to wipe off all the OS chores before and after the execution of your Test Suite.
If your base Web Client version is too old, then uninstall it through Revo Uninstaller and install a recent GA and released version of Web Client.
Take a System Reboot.
Execute your #Test.
Presumably, there was an instance of GeckoDriver and Firefox Browser Client active previously, so always invoke driver.quit() within tearDown(){} method to close & destroy the WebDriver and Web Client instances gracefully.
You can find a detailed discussion in:
How to fix “WebDriverException: Message: connection refused”?
Selenium Python selenium.common.exceptions.WebDriverException: Message: connection refused using geckodriver and firefox

Answer 2

You can try this code :
from selenium import webdriver
driver = webdriver.Firefox(executable_path = r'you web driver full path')
driver.get("http://seleniumhq.org/")

Answer 3

You need to kill all firefox processes to release the resources.
Add this line to kill.sh
kill $(ps aux | awk '/firefox/ {print $2}')
run
sh kill.sh