When searching for a bookmark in Manage Bookmarks, Firefox doesn't show the folder containing the bookmark(s) that were found. It would be helpful if Firefox showed the folder where the existing bookmarks are found.
Also, it would be useful to have a search bar in the pop-up menu when adding a bookmark, so you could quickly find the folder where you want to save it. It’s disappointing that Mozilla overlooks its users and misses out on so many great and practical ideas for the browser. Vivaldi has a similar feature - in the pop-up menu there is a search bar for the desired folder in the bookmarks manager.