How to quit modal dialog window in selenium headless browser?
Please run the following code before and after doing driver.get():
driver.execute_script('window.onbeforeunload = function() {}')It should work. I haven't checked but Firefox website should have more details on this event.
Basically you are resetting the handler in the webpage that gives that modal dialog box. So you won't see it displayed. This approach pretty much solved my issue.