Below is the solution is in Python with pyautogui (I think it's similar to autoit - so you can extend the same solution for your specific language also).
Pre-Condition:
save the extension image in the project folder (I saved it under "autogui_ref_snaps" folder in my example with "capture_full_screenshot.png" name
Python:
Imports needed
from selenium import webdriver
from selenium.webdriver import ChromeOptions
from Common_Methods.GenericMethods import *
import pyautogui #<== need this to click on extension
Script:
options = ChromeOptions()
options.add_argument("--load-extension=" + r"C:\Users\supputuri\AppData\Local\Google\Chrome\User Data\Default\Extensions\fdpohaocaechififmbbbbbknoalclacl\5.1_0") #<== loading unpacked extension
driver = webdriver.Chrome(
executable_path=os.path.join(chrome_options=options)
url = "https://google.com/"
driver.get(url)
# get the extension box
extn = pyautogui.locateOnScreen(os.path.join(GenericMethods.get_full_path_to_folder('autogui_ref_snaps') + "/capture_full_screenshot.png"))
# click on extension
pyautogui.click(x=extn[0],y=extn[1],clicks=1,interval=0.0,button="left")
If you are loading an extension and it's not available in incognito mode then follow my answer in here to enable it.