WebDriverException: Message: invalid argument: can't kill an exited process error with Selenium GeckoDriver and Firefox in Google Colab on Ubuntu

In a previous post (enter link description here) the following code (by DebanjanB)

# install firefox, geckodriver, and selenium
!apt-get update
!pip install selenium
!apt install firefox-geckodriver
!cp /usr/lib/geckodriver /usr/bin
!cp /usr/lib/firefox /usr/bin

from selenium import webdriver

binary = '/usr/bin/firefox'
options = webdriver.FirefoxOptions()
options.binary = binary
options.add_argument('start-maximized')
options.add_argument('--headless')
browser = webdriver.Firefox(firefox_options=options, executable_path='/usr/bin/geckodriver')
browser.get('http://google.com/')

which is correct, caused a version problem. I'm not an expert in Ubuntu.

I use Google Colaboratory, Python3.6, Selenium3.14.

WebDriverException                        Traceback (most recent call last)
<ipython-input-2-f7828de5f77c> in <module>()
      4 options.add_argument('start-maximized')
      5 options.add_argument('--headless')
----> 6 browser = webdriver.Firefox(options=options, executable_path='/usr/bin/geckodriver')
      7 driver.get("https://www.google.com")
      8 print(driver.page_source)
/usr/local/lib/python3.6/dist-packages/selenium/webdriver/firefox/webdriver.py in __init__(self, firefox_profile, firefox_binary, timeout, capabilities, proxy, executable_path, options, service_log_path, firefox_options, service_args, desired_capabilities, log_path, keep_alive)
    172                 command_executor=executor,
    173                 desired_capabilities=capabilities,
--> 174                 keep_alive=True)
    175 
    176         # Selenium remote

/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webdriver.py in __init__(self, command_executor, desired_capabilities, browser_profile, proxy, keep_alive, file_detector, options)
    155             warnings.warn("Please use FirefoxOptions to set browser profile",
    156                           DeprecationWarning, stacklevel=2)
--> 157         self.start_session(capabilities, browser_profile)
    158         self._switch_to = SwitchTo(self)
    159         self._mobile = Mobile(self)

/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webdriver.py in start_session(self, capabilities, browser_profile)
    250         parameters = {"capabilities": w3c_caps,
    251                       "desiredCapabilities": capabilities}
--> 252         response = self.execute(Command.NEW_SESSION, parameters)
    253         if 'sessionId' not in response:
    254             response = response['value']

/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/webdriver.py in execute(self, driver_command, params)
    319         response = self.command_executor.execute(driver_command, params)
    320         if response:
--> 321             self.error_handler.check_response(response)
    322             response['value'] = self._unwrap_value(
    323                 response.get('value', None))

/usr/local/lib/python3.6/dist-packages/selenium/webdriver/remote/errorhandler.py in check_response(self, response)
    240                 alert_text = value['alert'].get('text')
    241             raise exception_class(message, screen, stacktrace, alert_text)
--> 242         raise exception_class(message, screen, stacktrace)
    243 
    244     def _value_or_default(self, obj, key, default):

WebDriverException: Message: invalid argument: can't kill an exited process

I searched the internet and only found that this is a version conflict between Firefox and Geckodriver. But nobody gives the solution how to choose the compatible versions. This is my problem. Any help is appreciated.

After all the discussion within the comments it seems you erred the command to download GeckoDriver and possibly some issues with downloading and/or installing Firefox.

GeckoDriver

The command to install geckodriver within ubuntu was error prone:

!apt install firefox-geckodriver

Here are the detailed steps:

Browse to the geckodriver releases page. Checkout the compatible version of GeckoDriver for your platform and download it as follows:
```
wget https://github.com/mozilla/geckodriver/releases/download/v0.24.0/geckodriver-v0.24.0-linux64.tar.gz
```
Extract the file with:
```
tar -xvzf geckodriver*
```
Make it executable:
```
chmod +x geckodriver
```
Add the driver to your PATH so other tools can find it:
```
export PATH=$PATH:/path-to-extracted-file/.
```

Reference: How to install geckodriver in Ubuntu?

Firefox

The latest version of Firefox is always available as a security updates in all supported releases of Ubuntu and a normal update will install it. You need to enable the security or you need to update the repositories (e. g. Software & Updates -> Updates). You need to enable the Security by default but better to check if the package manager doesn't updates Firefox by default.

You can find the detailed steps in: