Im installing Firefox 54.0 first time on a clean setup of win 7 with all the updates done. After installng FF I tried restoring my bookmarks/favourites from the .json file but it says unable to process the backup file. So I tried importing them from the .html file but nothing happened. I then loaded the bookmarks in to Internet explorer and told FF to import from other browser but still nothing! Is this a bug in the latest update?