selenium script running on mozilla firefox

this is jagan i am using windos 10 OS and version 47 mozilla firefox browser while using these when i excuite script the website is navigated to “[https://www.mozilla.org/en-US/firefox/windows-10/welcome/?utm_source=firefox-browser&utm_medium=firefox-browser&utm_content=firstrun][1]” then browser will closing so please rectify this error plz plz……….emphasized text