Double click the clock in the bottom right hand corner of your screen (top for Macs) make sure that your date, time and timezone are all correct. if you change anything, it may ask you if your sure you want to do this, select yes. reboot computer. run firefox. it should work. also, be sure that you are running the latest version of mozilla firefox.
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Double click the clock in the bottom right hand corner of your screen (top for Macs) make sure that your date, time and timezone are all correct. if you change anything, it may ask you if your sure you want to do this, select yes. reboot computer. run firefox. it should work. also, be sure that you are running the latest version of mozilla firefox.