Pinning a tab group disassociates its children from it.

[RokeJulianLockhart]

Steps to reproduce

1. Create a tab.

2. Create a group, inside Sideberry, which contains that tab.

3. Pin that tab.

Actual behavior

The group is pinned, despite issues/2354. However, its children are disassociated with it:

@.Date.20260217T231032+0000.Type.Video.Origin.Pinning.a.tab.group.disassociates.its.children.from.it.Issue.2355.mbnuqw_sidebery.Firefox.Nightly.webm

Expected behavior

1. Pinning tab groups should be disallowed, hence issues/2353.

2. Tab groups should be pinnable, and retain their children when pinned.

System

fedora-release-identity-kde-desktop-43-26.noarch

Firefox version

Name        : firefox-nightly
Version     : 149.0a1
Release     : 20260218163018
Architecture: x86_64
Install Date: Wed 18 Feb 2026 23:52:39 GMT
Size        : 377338756
Signature   : (none)
Source RPM  : firefox-nightly-149.0a1-20260218163018.src.rpm
Build Date  : Wed 18 Feb 2026 22:10:49 GMT
Build Host  : 07a05bc57937
Vendor      : Mozilla

Sidebery version

5.4.0.xpi

Logs

Content Script execution in moz-extension document has been deprecated and it has been blocked (Extension ID: {3c078156-979c-498b-8990-85f7987dd929}). group.html
[bg] Tabs.injectGroupPageScript: Cannot inject script, tabId: 25 Error: Missing host permission for the tab chunk-7XYURGQR.js:4:15231
Content Script execution in moz-extension document has been deprecated and it has been blocked (Extension ID: {3c078156-979c-498b-8990-85f7987dd929}). group.html
[bg] Tabs.injectGroupPageScript: Cannot inject init data, reloading tab chunk-7XYURGQR.js:4:15231

[nx5314]

Also seen in the recording here is the issue of groups no longer functioning at all in the current firefox nightly, neither group name nor tabs within a given group are visible

[RokeJulianLockhart]

@nx5314, does a separate report exist?

[nx5314]

Apparently there is now, yes #2356