Thursday, May 2, 2013

Firefox - Error code: sec_error_reused_issuer_and_serial

Most likely it is due to a conflict in self signed certificate that you added as exception in Firefox.

Close Firefox & delete C:\Documents and Settings\<userAccount>\Application Data\Mozilla\Firefox\Profiles\<userProfile>\cert8.db. This will basically remove all the exceptions that you have added earlier.

Note: At times I had to delete the cert_override.txt file too from the same folder to get things working.

Open Firefox again, you should be good.


  1. Replies
    1. Just to that folder in your computer and delete the files like you delete any other files in your system. Select it and press 'delete' key and say 'Yes'. :)