Opera has its own blocker on board. AdSilence does not take its place; it adds what advertising does without showing an ad: recognition.
Opera uses the same foundation. It is the same package as in Chrome, Edge, Brave and Vivaldi — one extension, five browsers.
Graphics, fonts and audio give your machine away without any cookie. AdSilence shows every website a different picture of it.
Advertising is regional. AdSilence switches on the matching list based on your browser language — you do not have to choose one.