The faq doesn't specify Opera as supported. A number of online reviews DO say Opera is supported by PasswordBox.
The Blog indicates Opera IS supported.
So is Opera supported by PasswordBox or not?
From the PasswordBox blog:
PasswordBox Everywhere. It’s that simple.
Did you know that you can download free PasswordBox to all your devices? Grab our award-winning mobile app for iOS & Android devices, or get the extension for Chrome, IE, Safari, Opera & Firefox. Adding PasswordBox to another device earns you a free password space – and with automatic syncing, you’ll always have your passwords when you need them.
I'm so sorry but we were told that support staff would look after questions on the new products recently acquired by Intel.
According to the following FAQ only IE, Firefox and Chrome at the moment.
Support is here and free to call: Services and Support for Home and Office
Sorry that your post was ignored.