Opera has been doing this "custom version" thing for a little while as a kind of marketing tactic. I've seen it with a few popular content creators getting the

Opera has been doing this "custom version" thing for a little while as a kind of marketing tactic. I've seen it with a few popular content creators getting their own "custom version" of Opera where it has an on-brand theme and links to their content directly baked into the browser download. Presumably there is some kind of customisation pass that thinly wraps the regular installation process. I don't personally get the appeal but maybe big brands are more likely to feature the browser if it's customised (eg. live streaming a big chess.com game where the "official" tournament client is the Chess.com Opera Browser).