diff --git a/snappymail/v/0.0.0/themes/NextcloudV25+/styles.css b/snappymail/v/0.0.0/themes/NextcloudV25+/styles.css
index 07950a936..e48d8d6c5 100644
--- a/snappymail/v/0.0.0/themes/NextcloudV25+/styles.css
+++ b/snappymail/v/0.0.0/themes/NextcloudV25+/styles.css
@@ -2341,6 +2341,15 @@ html.rl-mobile #rl-app #V-AdminPane>.b-toolbar {
 	overflow-wrap: anywhere;
 }
 
+/* fallback (Firefox ignores complete selector list if :has is used) */
+#rl-app #V-PopupsNextcloudFiles li[data-icon],
+#rl-app #V-PopupsNextcloudFiles li details summary {
+	padding: 5px 10px;
+	display: flex;
+	align-items: center !important;
+	overflow-wrap: anywhere;
+}
+
 #rl-app #V-PopupsNextcloudFiles li button,
 #rl-app #V-PopupsNextcloudFiles li input {
 	margin-left: auto !important;