Review for Disable DragAndDrop (for Thunderbird 68+) by Firefox user f0c05b
Rated 5 out of 5 stars
After , YET AGAIN, accidentally moving a folder (barely) in TB Folder Tree and going through the pain & fear (all those emails disappeared!!! I found this perfect solution. Thank You! (PS TB developers, really this should be a built in behavior)
To create your own collections, you must have a Mozilla Add-ons account.