Easypass has been replaced by avast password about a year ago.
Unfortunately avast seems to be unwilling to support the Opera browser and not only with avast passwords.
I've seen quiet a lot requests to support Opera and not only for avast passwords, but also for e.g. AOS.
Depending on how you look at it, it is sad or funny to read this :
https://www.avast.com/faq.php?article=AVKB254#idt_050Only Chrome and Firefox supported it says.
So not even their own SafeZone browser is supported

Edge is (was?) not supported because Edge didn't had the option for plug-ins/add-ons, but it does now (after the Windows 10 Anniversary update).
In my opinion it really need to support:
Opera, Chrome, IE, Firefox, Safari and Edge.
To me it seems avast (as a commercial company) is missing out a huge opportunity to have more paying customers for avast passwords as they do not reach a lot of potential paying customers.