Re: Why is it so cumbersome to organise bookmarks on Firefox?
Have you used the library Window (Ctrl_Shift+B)? The bookmarks pane may have improvements it could use, but the vast majority of users find it works fine for them. You may be able to find an add-on at addons.mozilla.org that makes it easier to organize, or you can submit suggestions on how it can be fixed. This isn't the place to do that though.