uBlock/src/css/advanced-settings.css

html {
    height: 100vh;
    overflow: hidden;
    }
body {
    overflow: hidden;
    }
#advancedSettings {
    border-top: 1px solid #ddd;
    height: 75vh;
    text-align: left;
    width: 100%;
    }
.CodeMirror-wrap pre {
    word-break: break-all;
    }