Refer:
https://addons.mozilla.org/firefox/addon/hide-the-titlebar/
https://addons.mozilla.org/firefox/addon/minimize-the-window/
https://addons.mozilla.org/firefox/addon/close-the-window/

Install

• License: MIT License
• Weekly downloads: 6
• Average daily users: 94
• Rating: 4.6842/5 of 19 ratings
• Created: 2017-08-28 15:25:49
• Last updated: 2017-11-17 05:30:28
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/maximize-the-window/
• API: maximize-window-button@nanpuyue.com