Trying to restore bookmarks which vanished after latest Firefox update. Followed instructions: clicking managebookmarks to get to the library (which is completely empty after the last update) then up/down arrow button, then restore and choose file. Which should enable me to import a backup file. But nothing happens. No way of importing a backup file I found after some very tedious searching. Does anyone have any idea why the library functions aren't working and how can I get them to work? This is the article I was following: https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them#w_manual-backup