diff --git a/toolkit/mozapps/extensions/content/extensions.css b/toolkit/mozapps/extensions/content/extensions.css
index 7a6f72211104..cb63c4f4996c 100644
--- a/toolkit/mozapps/extensions/content/extensions.css
+++ b/toolkit/mozapps/extensions/content/extensions.css
@@ -195,6 +195,9 @@ setting[type="menulist"] {
 .addon .relnotes {
   -moz-user-select: text;
 }
+#detail-name, #detail-desc, #detail-fulldesc {
+  -moz-user-select: text;
+}
 
 /* Make sure we're not animating hidden images. See bug 623739. */
 #view-port:not([selectedIndex="0"]) #discover-view .loading,