I'm sorry to let you down, but what you're describing is not what I have visioned for this. But hey, if you're going to create this on your own, the source code for Backtick is available on GitHub (https://github.com/JoelBesada/Backtick) if there's anything you need to know!
Oh by the way, as mentioned in another comment, Vimium comes with a tool that probably is exactly what you're looking for. Just press 'b' to search through your bookmarks.