Thunderbird - add ability to manually sort (order) folders in folder pane

[Itagaki]

Thunderbird can move folders to different hierarchies using drag and drop. However, it is not possible to move them within the same hierarchy, i.e. reorder them.

The "Manually sort folders" add-on had helped to sort folders, but with Thunderbird 115 (Supernova), it is no longer available. It is time to make it a proper feature.

I was involved in the development of the add-on to make it Thunderbird 78 compatible and later as a collaborator. So, as an option, I have considered developing another add-on for Thunderbird 115. This may not be impossible. (John is providing a POC.) But I would like to consider implementing the ability to sort folders properly in Thunderbird.

My current thinking and the work required has been described here.

1846550 - add ability to manually sort (order) folders in folder pane (mozilla.org)

[Itagaki]

Good news. Now you can try out a nightly build of Thunderbird with the ability to rearrange folders at will.

https://ftp.mozilla.org/pub/thunderbird/nightly/2025/04/2025-04-04-10-03-46-comm-central-l10n/

[hellogab]

And I who use the extension mainly for the function of the "Folder to be opened at startup", what can I do?

[Stekar77]

Excellent news! I tried 139.0.a1 and all works perfectly well! Congrats for all your efforts @Itagaki !

[Itagaki]

@hellogab 

And I who use the extension mainly for the function of the "Folder to be opened at startup", what can I do?

I proposed it separately.

https://connect.mozilla.org/t5/ideas/thunderbird-specify-startup-folder/idi-p/47957

Unfortunately, however, there do not seem to be many supporters.
In any case, let's talk about it at the place mentioned above.

[Stekar77]

Excellent news! I tried 139.0a1 and it all works fine. Thank you and congrats for all your efforts @Itagaki 

[Xpinger65]

I use the extension called "Start with Inbox" it works for me on the latest stable version 🙂

[JimScherrer]

I'm still in need of a feature we once had called "Manually Sort Folders". I have many e-mail folders, and would like to reorder them manually. It was a nice add-on in prior versions. I await news of the addition of the function called "Manually Sort or Arrange Folders" on page.

[JimScherrer]

Thanks for your work on this feature "Manually Sort Folders"; eager to have it when it becomes available again; I would use it all the time.

[damufo]

Congrats for all your efforts @Itagaki !

Any date to stable release channel?

Very thanks!

[Itagaki]

@damufo 
Thunderbird roughly follows Firefox's ESR release schedule. Firefox 139 is scheduled for release on May 27. So Thunderbird 139 will be released a few days later or the following week.

https://whattrainisitnow.com/calendar/

[Stekar77]

@JimScherrerThe addon "Manually Sort Folders" (that I'm still using as I am still on version 105) will not be needed after Thunderbird version 139 is released, because then you can simply move/arrange folders with your mouse in the folder pane.