I have a very extensive list of bookmarks in the sidebar, organized in multiple layers of folders.
While moving around, I've found it far too easy to inadvertently move a folder and bury it in another folder or sub folder.
I'd like to see a "Lock Folders Position" option to prevent moving them once added and placed in position.
A Request for Enhancement can be submitted here:
Or, you can look for an extension that has that feature.
I have seen an extension with that feature, but I don't look for any extensions these days - I am set in my ways and really don't have room for any new extensions.