July 2nd, 2013
If you've upgraded from Opera 12 to Opera 15, you may notice that the browser has changed, and you may wonder what has happened to your data. Do not fear, Opera 15 has migrated much of this seamlessly for you.
During your upgrade, your Opera 12 profile was left unaltered. Data from your profile has been integrated into your new Opera 15 browser. This includes passwords, cookies, user-defined searches, and extensions. Your new browser has its own profile that has copied much of your Opera 12 profile.
Although most of your data has been integrated into Opera 15, some migration may need to be addressed manually. The following sections will help you understand where your data has gone and how to easily handle the upgrade to Opera 15.