This may have been one of the add-ons that kept me using Firefox before this last update. Integration into the toolbar allowing me to access my bookmarks without requiring me always go through the Diigo website was one of the main features that kept me using Diigo and Firefox. It was built into my daily routines. Without it, I now have to look into other alternatives. I have not fully reviewed the entire latest update so I will continue to review it, but as of now I am looking for better options.