Rated 5 out of 5 stars
I tagged all my bookmarks from the begining. I found no modern way in Firefox to use tags.
So there came TagSieve to achieve it.
I can now remember all my tags, search, combine, change. All of these on addressbar or sidebar.
With tagSieve, Firefox bookmarks become more modern, powerful and easily navigable.
For now, I ask the developer to make it compatible with Nightlies and Firefox Beta.