Sure, however: a) This built-in feature is way below the standards trivially achievable via extensions in Firefox, Chrome etc. b) It's a downgrade in relation

Sure, however: a) This built-in feature is way below the standards trivially achievable via extensions in Firefox, Chrome etc. b) It's a downgrade in relation to what Opera itself used to offer in the past (and then, if I recall, got so stripped of functionalities it didn't even support bookmarks at some point).