Recently closed folder is re-opened as tab group

[realpixelcode]

Preliminary Checks

• [x] I have read and understood the important section above.
• [x] I have searched existing issues and avoided creating duplicates.
• [x] I am not filing an enhancement request.
• [x] I have checked that this issue cannot be reproduced on Mozilla Firefox.
• [x] I have checked that this issue can be reproduced once I removed all my Mods and Custom CSS.

What happened?

A recently closed folder was re-opened as a Firefox-style tab group (instead of a Zen-style folder).

Expected behavior

The folder is re-opened as a folder.

Actual behavior

The folder is re-opened as a tab group.

Steps to reproduce

1. Create a new folder with tabs inside it.
2. Delete the folder.
3. Go to “recently closed tabs” and select the folder you just closed (it is labelled “tab group” instead of “folder” there).
4. A new Firefox-style tab group with the folder's tabs is created.

Screenshots and videos

No response

Version

1.15.2b (Firefox 142.0.1)

What platform are you seeing the problem on?

Linux (Flatpak), Linux (Tarball)

What component is this issue related to?

Tab Folders

Relevant log output if applicable

[dosubot[bot]]

Hi, @realpixelcode. I'm Dosu (https://dosu.dev), and I'm helping the desktop team manage their backlog and am marking this issue as stale.

Issue Summary:

• You reported that in version 1.15.2b on Linux, reopening a recently closed folder reopens it as a Firefox-style tab group instead of the intended Zen-style folder.
• This occurs after deleting a folder and selecting it from the "recently closed tabs," where it is labeled as a "tab group."
• There has been no further activity or comments on this issue since your initial report.

Next Steps:

• Please let me know if this issue is still relevant with the latest version of the desktop repository by commenting here to keep the discussion open.
• Otherwise, I will automatically close this issue in 10 days.

Thank you for your understanding and contribution!