Need help for script access via webdriver to an open web page in Firefox

[farshid]

To access an already open browser window, you can use the window_handles property of the WebDriver object, which returns a list of handles for all open windows. You can then switch to a specific window by passing the handle to the switch_to.window() method.

Here's an updated version of your script that should work:

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.firefox.service import Service

# path to keywords.txt-file
keyword_file_path = r"D:\Dokumente\Scripte\keywords.txt"

# starting Geckodriver-Service
service = Service(".\geckodriver.exe")
service.start()

# initialise Firefox Webdriver
driver = webdriver.Firefox(service=service)

# switch to the first window
driver.switch_to.window(driver.window_handles[0])
assert "Upload Page" in driver.title

try:
    # find input field
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "tags"))
    )

    # read keywords from file
    with open(keyword_file_path, "r") as f:
        keywords = [line.strip() for line in f]

    # insert keywords into input field followed by Enter
    for keyword in keywords:
        elem = driver.find_element(By.ID, "tags")
        elem.clear()
        elem.send_keys(keyword)
        elem.send_keys(Keys.RETURN)

        # wait until keyword is placed
        WebDriverWait(driver, 10).until(
            EC.text_to_be_present_in_element((By.ID, "tags"), keyword)
        )

finally:
    # quit Geckodriver-service
    driver.quit()
    service.stop()

In this updated version, we first switch to the first window using driver.switch_to.window(driver.window_handles[0]). If you have multiple windows open and want to switch to a specific one, you can modify this line accordingly.

Let me know if you have any further questions or if there's anything else I can help with!