--- a/devtools/client/netmonitor/src/assets/styles/RequestList.css
+++ b/devtools/client/netmonitor/src/assets/styles/RequestList.css
@@ -387,27 +387,28 @@
 .requests-list-response-header {
   width: 10%;
 }
 
 /* Domain column */
 
 .requests-list-domain {
   width: 30%;
+  line-height: 24px;
 }
 
 .requests-list-domain.requests-list-column {
   text-align: start;
 }
 
 .requests-security-state-icon {
   display: inline-block;
   width: 16px;
   height: 16px;
-  margin: 0 4px;
+  margin: 4px;
   vertical-align: top;
 }
 
 .request-list-item.selected .requests-security-state-icon {
   filter: brightness(1.3);
 }
 
 .security-state-insecure {
@@ -621,16 +622,19 @@
 .request-list-item {
   position: relative;
 /*
   display: table-row;
   Bug 1431132: Disabling this rule is surprising as we no longer have "rows".
   But this helps preventing reflowing the whole requests list anytime we append
   a new request/row.
 */
+}
+
+.request-list-item > .requests-list-column {
   height: 24px;
 }
 
 .request-list-item.selected {
   background-color: var(--theme-selection-background);
   color: var(--theme-selection-color);
 }