I use TB with multiple e-mail accounts. It would be great if there were a way, either natively or with an AddOn, to be able to change the order in which those accounts are displayed without having to Export all the e-mails, delete the accounts, delete and re-install TB, add the accounts back in the order that I want them and then Import all the mails back into TB. You know, just a way to easily change the order in which the accounts and all their subfolders are displayed. If an AddOn for this already exists, I can’t find it.
https://addons.thunderbird.net/en-US/thunderbird/addon/manually-sort-folders/?src=ss
Description: This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.
There is also a native solution for changing the order of accounts for quite a while: Thunderbird Tip: Rearrange The Order Of Your Accounts
In short, you can change the order by drag-and-drop or using the Alt+Up and Alt+Down hotkeys when the account name is selected.
This won’t change the order of the folders though.