Restoring a JSON backup can only replace your current bookmarks. To add to your current set of bookmarks, you must import an HTML backup. 1. Start Firefox in a new profile. * [[Use the Profile Manager to create and remove Firefox profiles]] 2. Restore your JSON backup in that profile. * [[Restore bookmarks from backup or move them to another computer]] 3. From that profile, export your bookmarks in HTML format. * [[Export Firefox bookmarks to an HTML file to back up or transfer bookmarks]] 4. Return to your regular profile and import the HTML bookmarks. * [[Import Bookmarks from an HTML file]]

Thanks! I may try and see if I can still access that old computer and do an export as html then. If not, I'll do your above description. Thanks!