Bug between STG and Mozilla's native Tabs Groups

[user67x]

When you switch between STG groups and you have before create a Tab group (for example 'Social') and you switch to another STG group, you can see the tab group open with another tabs that are initialy in this group.

Steps to reproduce the behavior:

1. Create two STG workspaces
2. Create a native Mozilla's Tab group and place in it seveval tabs
3. Switch to the other STG workspaces
4. I see that the Tab group is still open, but with another tabs in it

Expected behavior The Tabs Groups should appart to STG groups

[sr-tream]

To userChrome.css:

tab-group:not(:has(.tabbrowser-tab:not([hidden="true"]))) {
  display: none !important;
}

But this solution is bugged - if you create new or rename old group - it's corrupt width of hidden groups. And they are not fixed until browser restart/regroup all corrupted groups

[scheinercc]

Dup of #1237