Have you tried copying the files in that "Old Firefox Data folder into the currently active Profile folder?

http://support.mozilla.com/en-us/kb/Profiles#How_to_find_your_profile

Thanks it solve the problem ,but why sync account had a problem. if every time firefox crash I'll lost my sync account its big problem and when i try to reset password its refused and doesn't send me any email

Aurora isn't Firefox, yet.

Aurora is a 2nd stage Alpha version of what will become Firefox in 6 to 12 weeks.

If you aren't up to testing Alpha level software, which is updated almost daily, don't use Aurora!

http://www.mozilla.org/en-US/firefox/fx/#desktop

all the problem wasn't Aurora and wasn't crashing ,but losing my sync account and refusing reset its password by unknown problem. (the password was true and the email i try to reset password to was true also ). after crash i used Firefox 15 but sync account problem was exist  : can't access my sync account. after copying files from folder sync account back with same variable i used before .