--- a/devtools/client/themes/webconsole.css
+++ b/devtools/client/themes/webconsole.css
@@ -123,23 +123,21 @@ a {
 
 .message-flex-body > .message-location {
   margin-top: 0;
 }
 
 #output-wrapper {
   direction: ltr;
   overflow: auto;
+  -moz-user-select: text;
 }
 
-#output-container {
-  /* This width is set to a hardcoded px in webconsole.js since it's way
-     faster than using 100% with -moz-box-flex (see Bug 1237368) */
-  -moz-user-select: text;
-}
+/* The width on #output-container is set to a hardcoded px in webconsole.js
+   since it's way faster than using 100% with -moz-box-flex (see Bug 1237368) */
 
 #output-container.hideTimestamps > .message {
   -moz-padding-start: 0;
   -moz-margin-start: 7px;
   width: calc(100% - 7px);
 }
 
 #output-container.hideTimestamps > .message > .timestamp {