In my main space there's an "Imported Bookmarks" folder in the side bar. Yes it takes up 1 "tab space" but it's there, and doesn't really bother me. If you change spaces it's not there, so you can have "bookmarks" for each space, which is unique and beneficial if you use spaces for specific things.
That said, I primarily use Safari still, until other browsers adopt the SMS autofill of two factor codes it's going to be tough to leave Safari for personal use. Professional use I generally use chrome, as it's tied to our work google account.