No kidding. One or two upgrades ago, the bookmarking feature in FF changed from being simple and intuitive, to being WTF?
You used to be able to click on 'bookmarks menu', and all of your bookmark folders would display. From there, it was a simple matter to choose which folder to save the new bookmark in - but no more. Now, you get a choice of maybe five recent folders you've used, and that's it.
What really pisses me off, is that someone had to work to degrade that simple and useful feature. Had they simply left it alone, it would have been superior to what they have now.
Here's what I see when I try to bookmark...
When I select the 2nd down arrow (circled in red below) you see more...
Is that what you meant?