IF you are determined to get your bookmarks as a useful file, that you can save - free for use on BB and other Internet browsers . . . what I would do (but there other suggestions online):
See info re using GoodSync, that would help you get your hands on the Bookmarks JSON file:
‘In bookmark manager: copying a bookmark deletes other bookmark with same target - #5 by 289wk’
And then, how to effectively convert that file to a “bookmarks.html” file:
‘In bookmark manager: copying a bookmark deletes other bookmark with same target - #7 by 289wk’