Ask HN : Extension for better FireFox bookmark navigation

I have returned to using Firefox bookmarks now that delicious has 'lost' a bunch of my urls and because firefox can now sync bookmarks across machines

One of the annoyances I had with firefox bookmarks is still there though. If I last looked at a url in a subfolder and I want to look at another url there, I have to navigate through the whole tree again. The 'open all in tabs' menu option looks to me like a measure to deal with this but is not a solution. Is there an extension to solve this?