Teste bitte:
CSS
addon-page-options panel-list {
border: 2px ridge lightgrey !important;
border-radius: 10px !important;
background-color: rgb(32,32,35) !important;
width: 354px !important;
padding: 5px !important;
}
/* Hoverfarbe grün */
addon-page-options panel-list panel-item:hover {
border-radius: 20px !important;
background-color: green !important;
}
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