We all make mistakes and delete a bookmark by accident. Today, I deleted my family ancestry, which I have worked on for 2 years. All gone now. I checked my phone, and it was gone from there also. Make Firefox a little bit better.....
I like this idea. Along the lines of improvements to the bookmark manager and the display of bookmarks, this would be a great improvement. I don't know how bookmarks are stored, except that when exported, they seem to be in one long file with formatting determining the tree. How about a separate file of the same typer, containing only the removed/deleted bookmarks and folders. It could be accessed, restorations made, or emptied via 'Manage Bookmarks'