Develop Reference

How to minimize or hide the Geckodriver in Selenium?

This is what I have:
from selenium import webdriver
driver = webdriver.Firefox()
How can I let the geckodriver open minimized or hidden?

You have to set the firefox driver options to headless so that it opens minimized. Here is the code to do that.
fireFoxOptions = webdriver.FirefoxOptions()
fireFoxOptions.set_headless()
driver = webdriver.Firefox(firefox_options=fireFoxOptions)
If this doesn't work for you there are other methods that you can use. Check out this other SO question for those: How to make firefox headless programmatically in Selenium with python?

geckodriver
geckodriver in it's core form is a proxy for using W3C WebDriver-compatible clients to interact with Gecko-based browsers.
This program provides the HTTP API described by the WebDriver protocol to communicate with Gecko browsers, such as Firefox. It translates calls into the Firefox remote protocol by acting as a proxy between the local- and remote ends.
So more or less it acts like a service. So the question to minimize the GeckoDriver shouldn't arise.
Minimizing Mozilla Firefox browser
The Selenium driven GeckoDriver initiated firefox Browsing Context by default opens in semi maximized mode. Perhaps while executing tests with the browsing context being minimized would be against all the best practices as Selenium may loose the focus over the Browsing Context and an exception may raise during the Test Execution.
However, Selenium's python client does have a minimize_window() method which eventually minimizes the Chrome Browsing Context effectively.
Solution
You can use the following solution:
Firefox:
from selenium import webdriver
options = webdriver.FirefoxOptions()
options.binary_location = r'C:\Program Files\Mozilla Firefox\firefox.exe'
driver = webdriver.Firefox(firefox_options=options, executable_path=r'C:\WebDrivers\geckodriver.exe')
driver.get('https://www.google.co.in')
driver.minimize_window()
Chrome:
from selenium import webdriver
options = webdriver.ChromeOptions()
options.add_argument("--start-maximized")
options.add_experimental_option("excludeSwitches", ["enable-automation"])
options.add_experimental_option('useAutomationExtension', False)
driver = webdriver.Chrome(chrome_options=options, executable_path=r'C:\Utility\BrowserDrivers\chromedriver.exe')
driver.get('https://www.google.co.in')
driver.minimize_window()
Reference
You can find a detailed relevant discussion in:
How to Minimize browser window in selenium webdriver 3
tl; dr
How to make firefox headless programmatically in Selenium with python?

How to initiate a Chromium based Vivaldi browser session using Selenium and Python

I am trying to use the vivaldi browser with Selenium. It is a chromium browser that runs very similar to chrome. I have Selenium working with Firefox (geckodriver), and Google Chrome(chromedriver), but I can't seem to find a way with Vivaldi. Any help would be appreciated.

If the vivaldi binary by default is located at C:\Users\levir\AppData\Local\Vivaldi\Application\vivaldi.exe you can use the following solution:
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
options = Options()
options.add_argument("start-maximized")
options.binary_location=r'C:\Users\levir\AppData\Local\Vivaldi\Application\vivaldi.exe'
driver = webdriver.Chrome(executable_path=r'C:\path\to\chromedriver.exe', options=options)
driver.get('http://google.com/')

For future reference:
to make Vivaldi work with selenium you need to make sure of three things :
The correct version of ChromeDriver
Set selenium's driver to use Vivaldi's binary via webdriver.ChromeOptions()
Make sure you're getting the correct url (don't forget "https://")
All of the above is explained step by step with screenshots in this blog post

The key executable_path will be deprecated in the upcoming releases of Selenium.
This post has the solution. I'm posting a copy of said solution with the path to Vivaldi, where the username is fetched by the script so you don't have to hard code it.
from selenium import webdriver
from selenium.webdriver.chrome.service import Service
import os
current_user = os.getlogin()
s = Service(rf"C:\Users\{current_user}\AppData\Local\Vivaldi\Application\vivaldi.exe")
driver = webdriver.Chrome(service=s)
driver.get("http://duckduckgo.com") # or your website of choice

You can use ChromeOptions and supply binary.
from selenium.webdriver.chrome.options import Options
opt = Options()
opt.binary_location = chromium_path//path to chromium binary
driver = webdriver.Chrome(options=opt, executable_path="path_to_chromedriver")

How can I make a Selenium script undetectable using GeckoDriver and Firefox through Python?

Is there a way to make your Selenium script undetectable in Python using geckodriver?
I'm using Selenium for scraping. Are there any protections we need to use so websites can't detect Selenium?

There are different methods to avoid websites detecting the use of Selenium.
The value of navigator.webdriver is set to true by default when using Selenium. This variable will be present in Chrome as well as Firefox. This variable should be set to "undefined" to avoid detection.
A proxy server can also be used to avoid detection.
Some websites are able to use the state of your browser to determine if you are using Selenium. You can set Selenium to use a custom browser profile to avoid this.
The code below uses all three of these approaches.
profile = webdriver.FirefoxProfile('C:\\Users\\You\\AppData\\Roaming\\Mozilla\\Firefox\\Profiles\\something.default-release')
PROXY_HOST = "12.12.12.123"
PROXY_PORT = "1234"
profile.set_preference("network.proxy.type", 1)
profile.set_preference("network.proxy.http", PROXY_HOST)
profile.set_preference("network.proxy.http_port", int(PROXY_PORT))
profile.set_preference("dom.webdriver.enabled", False)
profile.set_preference('useAutomationExtension', False)
profile.update_preferences()
desired = DesiredCapabilities.FIREFOX
driver = webdriver.Firefox(firefox_profile=profile, desired_capabilities=desired)
Once the code is run, you will be able to manually check that the browser run by Selenium now has your Firefox history and extensions. You can also type "navigator.webdriver" into the devtools console to check that it is undefined.

The fact that selenium driven Firefox / GeckoDriver gets detected doesn't depends on any specific GeckoDriver or Firefox version. The Websites themselves can detect the network traffic and can identify the Browser Client i.e. Web Browser as WebDriver controled.
As per the documentation of the WebDriver Interface in the latest editor's draft of WebDriver - W3C Living Document the webdriver-active flag which is initially set as false, is set to true when the user agent is under remote control i.e. when controlled through Selenium.
Now that the NavigatorAutomationInformation interface should not be exposed on WorkerNavigator.
So,
webdriver
Returns true if webdriver-active flag is set, false otherwise.
where as,
navigator.webdriver
Defines a standard way for co-operating user agents to inform the document that it is controlled by WebDriver, for example so that alternate code paths can be triggered during automation.
So, the bottom line is:
Selenium identifies itself
However some generic approaches to avoid getting detected while web-scraping are as follows:
The first and foremost attribute a website can determine your script/program is through your monitor size. So it is recommended not to use the conventional Viewport.
If you need to send multiple requests to a website, you need to keep on changing the User Agent on each request. Here you can find a detailed discussion on Way to change Google Chrome user agent in Selenium?
To simulate human like behavior you may require to slow down the script execution even beyond WebDriverWait and expected_conditions inducing time.sleep(secs). Here you can find a detailed discussion on How to sleep webdriver in python for milliseconds

As per the current WebDriver W3C Editor's Draft specification:
The webdriver-active flag is set to true when the user agent is under remote control. It is initially false.
Hence, the readonly boolean attribute webdriver returns true if webdriver-active flag is set, false otherwise.
Further the specification further clarifies:
navigator.webdriver Defines a standard way for co-operating user
agents to inform the document that it is controlled by WebDriver, for
example so that alternate code paths can be triggered during
automation.
There had been tons and millions of discussions demanding Feature: option to disable navigator.webdriver == true ? and #whimboo in his comment concluded that:
that is because the WebDriver spec defines that property on the
Navigator object, which has to be set to true when tests are running
with webdriver enabled:
https://w3c.github.io/webdriver/#interface
Implementations have to be conformant to this requirement. As such we
will not provide a way to circumvent that.
Generic Conclusion
From the above discussions it can be concluded that:
Selenium identifies itself
and there is no way to conceal the fact that the browser is WebDriver driven.
Recommendations
However some users have suggested approaches which can conceal the fact that the Mozilla Firefox browser is WebDriver controled through the usage of Firefox Profiles and Proxies as follows:
selenium4 compatible python code
from selenium.webdriver import Firefox
from selenium import webdriver
from selenium.webdriver.firefox.service import Service
from selenium.webdriver.firefox.options import Options
profile_path = r'C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\s8543x41.default-release'
options=Options()
options.set_preference('profile', profile_path)
options.set_preference('network.proxy.type', 1)
options.set_preference('network.proxy.socks', '127.0.0.1')
options.set_preference('network.proxy.socks_port', 9050)
options.set_preference('network.proxy.socks_remote_dns', False)
service = Service('C:\\BrowserDrivers\\geckodriver.exe')
driver = Firefox(service=service, options=options)
driver.get("https://www.google.com")
driver.quit()
Other Alternatives
It is observed that in some specific os variants a couple of diverse settings/configuration can bypass the bot detectation which are as follows:
selenium4 compatible code block
from selenium import webdriver
from selenium.webdriver.firefox.options import Options
from selenium.webdriver.chrome.service import Service
options = Options()
options.add_experimental_option("excludeSwitches", ["enable-automation"])
options.add_experimental_option('excludeSwitches', ['enable-logging'])
options.add_experimental_option('useAutomationExtension', False)
options.add_argument('--disable-blink-features=AutomationControlled')
s = Service('C:\\BrowserDrivers\\geckodriver.exe')
driver = webdriver.Chrome(service=s, options=options)
Potential Solution
A potential solution would be to use the tor browser as follows:
selenium4 compatible python code
from selenium.webdriver import Firefox
from selenium import webdriver
from selenium.webdriver.firefox.service import Service
from selenium.webdriver.firefox.options import Options
import os
torexe = os.popen(r'C:\Users\username\Desktop\Tor Browser\Browser\TorBrowser\Tor\tor.exe')
profile_path = r'C:\Users\username\Desktop\Tor Browser\Browser\TorBrowser\Data\Browser\profile.default'
firefox_options=Options()
firefox_options.set_preference('profile', profile_path)
firefox_options.set_preference('network.proxy.type', 1)
firefox_options.set_preference('network.proxy.socks', '127.0.0.1')
firefox_options.set_preference('network.proxy.socks_port', 9050)
firefox_options.set_preference("network.proxy.socks_remote_dns", False)
firefox_options.binary_location = r'C:\Users\username\Desktop\Tor Browser\Browser\firefox.exe'
service = Service('C:\\BrowserDrivers\\geckodriver.exe')
driver = webdriver.Firefox(service=service, options=firefox_options)
driver.get("https://www.tiktok.com/")

It may sound simple, but if you look how the website detects selenium (or bots) is by tracking the movements, so if you can make your program slightly towards like a human is browsing the website you can get less captcha, such as add cursor/page scroll movements in between your operations, and other actions which mimics the browsing. So between two operations try to add some other actions, Add some delay etc. This will make your bot slower and could get undetected.
Thanks

Using Python Selenium Webdriver to open Electron Application

I've been attempting to bypass using Spectron for End2End testing an electron application by leveraging my experience with Selenium Webdriver on Python.
Using a combination of the Chromedriver get started page, and several resources that seem to suggest its possible, this is what I came up with:
from selenium import webdriver
import selenium.webdriver.chrome.service as service
servicer = service.Service('C:\\browserDrivers\\chromedriver_win32\\chromedriver.exe')
servicer.start()
capabilities = {'chrome.binary': 'C:\\path\\to\\electron.exe'}
remote = webdriver.remote.webdriver.WebDriver(command_executor=servicer.service_url, desired_capabilities = capabilities, browser_profile=None, proxy=None, keep_alive=False
The issue is that instead of opening the electron application, it opens a standard instance of Chrome.
Most of resources I've seen have been several years old so something may have changed to make it no longer possible.
Does anyone know of a way to use Python Selenium WebDriver to test an Electron application?

Below works great for me
from selenium import webdriver
options = webdriver.ChromeOptions()
options.binary_location = "/Applications/Electron.app/Contents/MacOS/Electron"
driver = webdriver.Chrome(chrome_options=options)
driver.get("http://www.google.com")
driver.quit()

How to make Selenium not wait till full page load, which has a slow script?

Selenium driver.get (url) wait till full page load. But a scraping page try to load some dead JS script. So my Python script wait for it and doesn't works few minutes. This problem can be on every pages of a site.
from selenium import webdriver
driver = webdriver.Chrome()
driver.get('https://www.cortinadecor.com/productos/17/estores-enrollables-screen/estores-screen-corti-3000')
# It try load: https://www.cetelem.es/eCommerceCalculadora/resources/js/eCalculadoraCetelemCombo.js
driver.find_element_by_name('ANCHO').send_keys("100")
How to limit the time wait, block AJAX load of a file, or is other way?
Also I test my script in webdriver.Chrome(), but will use PhantomJS(), or probably Firefox(). So, if some method uses a change in browser settings, then it must be universal.

When Selenium loads a page/url by default it follows a default configuration with pageLoadStrategy set to normal. To make Selenium not to wait for full page load we can configure the pageLoadStrategy. pageLoadStrategy supports 3 different values as follows:
normal (full page load)
eager (interactive)
none
Here is the code block to configure the pageLoadStrategy :
Firefox :
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
caps = DesiredCapabilities().FIREFOX
caps["pageLoadStrategy"] = "normal" # complete
#caps["pageLoadStrategy"] = "eager" # interactive
#caps["pageLoadStrategy"] = "none"
driver = webdriver.Firefox(desired_capabilities=caps, executable_path=r'C:\path\to\geckodriver.exe')
driver.get("http://google.com")
Chrome :
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
caps = DesiredCapabilities().CHROME
caps["pageLoadStrategy"] = "normal" # complete
#caps["pageLoadStrategy"] = "eager" # interactive
#caps["pageLoadStrategy"] = "none"
driver = webdriver.Chrome(desired_capabilities=caps, executable_path=r'C:\path\to\chromedriver.exe')
driver.get("http://google.com")
Note : pageLoadStrategy values normal, eager and none is a requirement as per WebDriver W3C Editor's Draft but pageLoadStrategy value as eager is still a WIP (Work In Progress) within ChromeDriver implementation. You can find a detailed discussion in “Eager” Page Load Strategy workaround for Chromedriver Selenium in Python

#undetected Selenium answer works well but for the chrome, part its not working use the below answer for chrome
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
capa = DesiredCapabilities.CHROME
capa["pageLoadStrategy"] = "none"
browser= webdriver.Chrome(desired_capabilities=capa,executable_path='PATH',options=options)