MacOs Titlebar Buttons Flag not Working

**Describe the bug**
Macos buttons flag doesn't work 

**To Reproduce**
N/A

**Screenshots or video**

<img width="237" height="140" alt="Image" src="https://github.com/user-attachments/assets/e381c9d3-13fb-4836-a19d-991b4fe538ae" />

**Firefox version (please complete the following information):**
 - Version Version 146.0.1 (64-bit)

**Additional context**
N/A
