我找到了解决方案,创建文件:
C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\83gzv38p.dev-edition-default-1694095885796\chrome\userContent.css
@-moz-document url-prefix("chrome://devtools/content/"){
.editor-wrapper{
bottom: 0 !important;
}
.source-footer{
display: none !important;
}
}