[BUG] Single tab hiding is not deactivated when switched on, then off

[xplosionmind]

• My issue is related to Add Water, the standalone installer app, and is not related to the Firefox GNOME Theme.

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Describe the bug
If the “Hide Single Tab” option is enabled, and the profile is saved, the change takes effect. Nevertheless, when the option is disabled again, the single tab stays hidden.

To Reproduce
Steps to reproduce the behavior:

1. Enable “Hide Single Tab”
2. Save profile and restart browser
3. Disable “Hide Single Tab”
4. Save profile and restart browser
5. Single tab stays hidden…

Expected behavior
If “Hide Single Tab” is disabled, when there is only one tab open it should appear in the tab bar.

Technical Details:

 - Distribution: Fedora 42
 - Desktop environment: GNOME 48
 
 - Add Water version: v1.2.6
 - Add Water package format: Flatpak
 - Theme version: v137

 - Browser name: Firefox
 - Browser package format: rpm bundled with Fedora by default
 - Browser version: 137.0

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• I have included enough relevant information to solve my problem.