Enable Do to open URLs/bookmarks in either a new tab, the same tab or a new window

When opening bookmarks with Gnome DO, it defaults to open them in a new tab. I would like to have the opportunity to choose between opening bookmarks in a new tab, the same tab or a new window. I'm not sure if this would work best as a new plugin, or merged with the existing Firefox-handling. I'm thinking it could be part of a preference dialogue, so that the default behaviour still is the same as now, but the new feature can be turned on. To do this in action, you would invoke DO, type bookmark, tab over and choose between open in new tab, open in same tab, and open in new window. DO should learn your most used action, and default to that. A third pane is also a possibility.