I posted as a wish-list type item the need for the basic browser to both make the bookmark, via a button/icon, and put it in the folder the user selects.

https://forums.opera.com/topic/2074/home-button-and-bookmarks-button/7

We all know why Opera is slow to the dance. They didn't think that they would need to have a personal bookmarks bar (thinking that the Speed Dial and Stash would be enough). Well, they understand now it isn't enough -- that their public and prospective public demands for desktop computers adequate tradtional bookmarking -- and so they added the bar, but on follow-up refinements (like the actual bookmarking) they still need to play catch-up, because the competing browsers already have this type of feature.