Works just as I want it, but I want to know if it's possible to export the data or if there is somwhere the data is saved so that I can make a copy. Sometimes Firefox glitches out on me or I need to switch profiles and the Workspaces data is just gone, which gives me a scare. This would happen with the old version of this plugin where I was unable to retrieve any of the tabs I had saved.
IMPORTANT UPDATE. I realized how this loses all data. If you have multiple windows open, and you close the original window, it will overwrite EVERYTHING with the new window. Please be aware of this when using this addon.