UnexpectedAlertPresentException exc.msg does not contain the prompt message

System

Version: 0.35
Platform: Linux
Firefox: 131.0 (64-bit)
Selenium: 4.25.0

Description

The exception raised in geckodriver does not contain the prompt message anymore. In selenium UnexpectedAlertPresentException we do not have any info anymore what was the content of the automatically dismissed prompt

Current message

"message":"Unexpected alert dialog detected. Performed handler \"dismiss\""

Previous message

"message":"Dismissed user prompt dialog: This is a triggered alert!"

Is this the expected behavior now for geckodriver? For chrome the prompt message is still passed to the exception.

Testcase

from selenium import webdriver
from selenium.webdriver.firefox.service import Service
from selenium.webdriver.firefox.options import Options
from selenium.common.exceptions import UnexpectedAlertPresentException

firefox_options = Options()
# firefox_options.unhandled_prompt_behavior = "ignore"
firefox_options.log.level = "trace"
service = Service(executable_path=geckodriver_path, log_output="trace.log")
driver = webdriver.Firefox(service=service, options=firefox_options)

try:
    driver.get("data:text/html,<html><body></body></html>")
    driver.execute_script("alert('This is a triggered alert!');")
    assert driver.switch_to.alert.text
    driver.title  # Trigger unexpected alert
    assert False, "No exception"
except UnexpectedAlertPresentException as e:
    print(f"Exception: {e}")
    print(e.msg)
finally:
    driver.quit()

Stacktrace

Alert Text: None
Message: Unexpected alert dialog detected. Performed handler "dismiss"
Stacktrace:
RemoteError@chrome://remote/content/shared/RemoteError.sys.mjs:8:8
WebDriverError@chrome://remote/content/shared/webdriver/Errors.sys.mjs:193:5
UnexpectedAlertOpenError@chrome://remote/content/shared/webdriver/Errors.sys.mjs:800:5
GeckoDriver.prototype._handleUserPrompts@chrome://remote/content/marionette/driver.sys.mjs:2962:11

Trace-level log

Attached file trace.log

1728528535324   webdriver::server   DEBUG   <- 500 Internal Server Error {"value":{"error":"unexpected alert open","message":"Unexpected alert dialog detected. Performed ... Errors.sys.mjs:800:5\nGeckoDriver.prototype._handleUserPrompts@chrome://remote/content/marionette/driver.sys.mjs:2962:11\n"}}

Old Trace log from Firefox 125.0.1 trace.log

1728527680840   webdriver::server   DEBUG   <- 500 Internal Server Error {"value":{"error":"unexpected alert open","message":"Dismissed user prompt dialog: This is a tri ... Errors.sys.mjs:800:5\nGeckoDriver.prototype._handleUserPrompts@chrome://remote/content/marionette/driver.sys.mjs:2835:13\n"}}

-->

mozilla / geckodriver

UnexpectedAlertPresentException exc.msg does not contain the prompt message #2204

System

Description

Testcase

Stacktrace

Trace-level log