Tabs always leave space for "traffic lights" in Fire Window fullscreen mode

[rkrenecky]

In a Fire Window opened in fullscreen mode, the tabs always leave space for the “traffic lights” (minimize/close/fullscreen buttons), even when the traffic lights are hidden. Unlike the regular browser window, where tabs dynamically adjust their position and size based on the visibility of the traffic lights, the Fire Window does not shift the tabs when the traffic lights appear or disappear.

Steps to Reproduce

1. Open the app in fullscreen mode.
2. Open a Fire Window.
3. Observe the tab behavior:
   • Tabs always leave space for the traffic lights, even when the traffic lights are hidden.
   • Tabs do not dynamically adjust their position or size when the traffic lights appear or disappear.

Expected Behavior

Tabs in the Fire Window should dynamically adjust their position and size to make space for the traffic lights only when they are visible, just like in the regular browser window.

Observed Behavior

Tabs in the Fire Window always leave a fixed space for the traffic lights, regardless of their visibility.

Environment

• App Version: 1.118.0 (329)
• macOS Version: Sequoia 15.2

Video Evidence

fire-window-bug.mov