Python - Function `execute_cdp_cmd` only work for first tab in chromedriver

🐛 Bug Report

I have use execute_cdp_cmd to excute some script before loading website. But execute_cdp_cmd only work for first tab. Step:

• When browser start and first tab open, execute_cdp_cmd work perfect.
• I click plus icon to open new tab. In second tab, execute_cdp_cmd not working - not run script.
• I close all tab and open new tab (first tab - only one tab), execute_cdp_cmd work perfect

My code: (source is js script like console.log)

import os
import sys
from time import sleep
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait, Select
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.remote.webdriver import WebDriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

source = """
  alert('test')
"""

def init_webdriver():
    dir_path = os.path.dirname(os.path.realpath(__file__))
    driver_path = '/usr/local/bin/chromedriver'
    driver = webdriver.Chrome(executable_path=driver_path)
    driver.execute_cdp_cmd("Page.addScriptToEvaluateOnNewDocument", {
      "source": source
    })
    return driver

if __name__ == '__main__':
    init_webdriver().get('https://github.com')
    sleep(5000000)

Video demo: https://gyazo.com/3a54b80bbd94a71cbfd9133d646dd3ec

Environment

OS: MacOs 11.2.3 Browser: Chrome Browser version: 89 Browser Driver version: ChromeDriver 89 Language Bindings version: python 3.9 Selenium Grid version (if applicable): lasted

[diemol]

I can see the behaviour you mention but I am not sure if this is an issue or not. After checking https://chromedevtools.github.io/devtools-protocol/tot/Page/#method-addScriptToEvaluateOnNewDocument, it says:

Evaluates given script in every frame upon creation (before loading frame’s scripts).

I am not sure what every frame means in this context. I am assuming this needs to be done per tab. Do you have any official docs mentioning that it should work for all tabs? No matter if the tab is open manually?

One important thing to note is that Selenium WebDriver allows you to interact with CDP, but it does not guarantee the behaviour in CDP is correct. That is why I recommend you to create an issue here to understand what the expected behaviour is.

[diemol]

Closing this as we did not get more information or feedback after the previous comment.