firefox --new-instance -profile <hash>.profile
<hash>.profile has a user.js with
user_pref("dom.disable_open_during_load",false);
user_pref("browser.translations.automaticallyPopup",false);
user_pref("browser.startup.page",0);
user_pref("browser.startup.homepage","");
user_pref("datareporting.healthreport.uploadEnabled",false);
user_pref("datareporting.policy.dataSubmissionEnabled",false)
user_pref("datareporting.sessions.current.clean", true);
Thanks in Advance
user_pref("termsofuse.bypassNotification",true);
actually was the solution...so please forget my previous mail.
Thank your for pointing out !