What happened to my Live Bookmarks?

I've reinstalled a backup I kept of FF 36 - my entire workflow has been gutted over the years.

1) Lost Tab Groups as of FF 45 (the add-on isn't a full replacement of old functionality)

2) Lost many, many, many addons with FF 57 including a very specific tab management that an addon called FireGestures allowed for: using a context menu to navigate my tabs.

3) Lost Bookmark descriptions with FF 62, also lost the Developer Toolbar

4) Now losing Live Bookmarks with FF 64