求助：FF77多了个向下还原，请问怎么去掉呢？谢谢

图片：QQ图片20200607112102.png

/*标签栏背景&系统控制按钮*/
#main-window {-moz-appearance: none !important;background-color: #c8c8c8 !important;overflow: hidden !important;margin: 0 !important;padding: 0 !important;}
.titlebar-buttonbox {-moz-appearance: none !important;margin: 0 !important;padding: 0 !important;}
.titlebar-buttonbox > toolbarbutton, #window-controls > toolbarbutton {-moz-appearance: none !important;display: -moz-box !important;border: none !important;margin: 0 !important;padding: 0 !important;}
/*-----------------标签栏背景&系统控制按钮-------------------*/
 
/*-----win10下修复大小和背景-----*/
.titlebar-buttonbox .toolbarbutton-icon{width: auto !important; height: auto !important;}
.titlebar-buttonbox toolbarbutton{background: 0 !important;}
 
#main-window:not([inFullscreen]) .titlebar-min, #main-window:not([inFullscreen]) .titlebar-max, #main-window:not([inFullscreen]) .titlebar-close {
list-style-image: none !important;
}
/*Min*/
#main-window:not([inFullscreen]) .titlebar-min, #main-window:not([inFullscreen]) .titlebar-min:hover, #main-window:not([inFullscreen]) .titlebar-min:active {
background:no-repeat url("data:image/png;base64,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") !important;
background-position: 0 5px !important;
}
#main-window:not([inFullscreen]) .titlebar-min {
-moz-image-region:rect(20px, 23px, 20px, 0px) !important;
}
#main-window:not([inFullscreen]) .titlebar-min:hover {
background-position: 51% 5px !important;
}
#main-window:not([inFullscreen]) .titlebar-min:active {
-moz-image-region:rect(20px, 69px, 20px, 46px) !important;
}
/*Max*/
#main-window:not([inFullscreen]) .titlebar-max, #main-window:not([inFullscreen]) .titlebar-max:hover, #main-window:not([inFullscreen]) .titlebar-max:active {
background:no-repeat url("data:image/png;base64,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") !important;
background-position: 0 5px !important;
}
#main-window:not([inFullscreen]) .titlebar-max {
-moz-image-region:rect(20px, 23px, 20px, 0px) !important;
}
#main-window:not([inFullscreen]) .titlebar-max:hover {
background-position: 51% 5px !important;
}
#main-window:not([inFullscreen]) .titlebar-max:active {
-moz-image-region:rect(20px, 69px, 20px, 46px) !important;
}
/*Close*/
#main-window:not([inFullscreen]) .titlebar-close, #main-window:not([inFullscreen]) .titlebar-close:hover, #main-window:not([inFullscreen]) .titlebar-close:active {
background: no-repeat url("data:image/png;base64,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") !important;
background-position: 0 5px !important;
}
#main-window:not([inFullscreen]) .titlebar-close {
-moz-image-region:rect(20px, 36px, 20px, 0px) !important;
}
#main-window:not([inFullscreen]) .titlebar-close:hover {
background-position: 50% 5px !important;
}
#main-window:not([inFullscreen]) .titlebar-close:active {
-moz-image-region:rect(20px, 108px, 20px, 72px) !important;
}
/*Restore*/
#main-window[sizemode="maximized"]:not([inFullscreen]) .titlebar-max, #main-window[sizemode="maximized"]:not([inFullscreen]) .titlebar-max:hover, #main-window[sizemode="maximized"]:not([inFullscreen]) .titlebar-max:active {
background: no-repeat url("data:image/png;base64,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") !important;
background-position: 0 5px !important;
}
#main-window[sizemode="maximized"]:not([inFullscreen]) .titlebar-max {
-moz-image-region:rect(20px, 23px, 20px, 0px) !important;
}
#main-window[sizemode="maximized"]:not([inFullscreen]) .titlebar-max:hover {
background-position: 51% 5px !important;
}
#main-window[sizemode="maximized"]:not([inFullscreen]) .titlebar-max:active {
-moz-image-region:rect(20px, 69px, 20px, 46px) !important;

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