Close, maximize and minimize buttons from Firefox disappear when I select the "No Titlebar in preferences" (CSD) - Problem persists with other themes and safe mode : r/kde
How to change the color of Minimize, Maximize and Close buttons to white in Full Screen? : r/FirefoxCSS
how do I move close,max,min buttons location | Firefox Support Forum | Mozilla Support
Customize Mozilla Firefox Menu Button Options Using Personal Menu (Personal Firefox Button) Extension – AskVG
How can place Firefox's tab close buttons on the left? - Ask Ubuntu
restore close button on right tabstrip feature, legacy to quantum browser.tabs.closeButtons preference | Firefox Support Forum | Mozilla Support
Can I move the Minimize, Restore and Close buttons plus the the Firefox symbol and description of which tab I'm on to the Menu Toolbar? | Firefox Support Forum | Mozilla Support