The Mozilla Developer Network exposed the email addresses and encrypted passwords of 97,000 users for three months after a server migration. The users were early adopted of Mozilla's Bugzilla bug tracking software. The company has discovered the leak and has taken precautions to server the data. This is the second leak that the company has disclosed in the last month. Earlier this month, the Mozilla Foundation revealed that it had accidentally exposed 76,000 email addresses and 4,000 encrypted passwords for a month.