This add-on is actually the missing link between Tree Style Tabs (TST) and Firefox's reliable bookmark database! You can save a tree node in bookmarks and all sub folders are created automatically. And you can correctly restore that (sub)tree later via the restore tree function; thanks!

The only missing function (as of 2018-11) for a *productive and granular tabs backup system* is that the restore tree function does not yet support lazy-loading of tabs (all restored tabs load simultaneously...). Please consider adding lazy loading of tabs in the restore tree function.

Additionally it would be great for convenience and productivity, if it was possible to bind your "restore tree" function to dragging and dropping a previously saved bookmarks folder into the TST tabs tree. Likewise, binding your "bookmark tree data" function to D&D of a TST tab node into the bookmarks tree would be helpful for more control over the backup target folder. Is this possible with the current FF API? That would make a truly great and productive hierarchical tabs backup system... :)