Because I don't have time to keep the verification code.

Check your profile setting at that website. Your ‘logged-in’ status is stored in special cookies&#46; If the cookie is removed, you are logged out&#46; You may be in Private Browsing mode or told Firefox not to remember&#46; Type '''about:preferences#privacy'''<enter> in the address bar&#46; The button next to '''History, ''' select '''Use Custom Settings&#46; ''' Turn off '''Always Use Private Browsing Mode''' Turn on '''Remember My Browsing And Download History''' At the bottom of the page, turn on '''Clear History When Firefox Closes&#46; ''' At the far right, press the '''Settings''' button&#46; Turn on ONLY '''Cache''' and '''Form And Search History''' leaving the others off&#46;