Hi, thank you for your review. You can delete a bookmark by dragging it and dropping it into the big box marked "Delete", which should appear at the bottom of the screen while dragging.
Please note that for now, it's impossible to delete a folder containing multiple bookmarks, you have to delete each bookmarks in it before deleting the folder.

It might be a bit complicated (in term of code, I want to keep things simple) to give the ability to select multiple bookmarks. But keeping the scroll position after deleting a bookmark, yes, that's definitely something I can work on.

Now that I think of it, I'll try to add the ability to hover + press the DEL key to delete a bookmark.