diff --git a/Common-Overrides.md b/Common-Overrides.md
index aca66a2..3767c95 100644
--- a/Common-Overrides.md
+++ b/Common-Overrides.md
@@ -141,6 +141,7 @@ user_pref("gfx.canvas.accelerated", true);
 #### Increase Size of Disk Cache
 Allows the disk cache 1GB on storage.
 ```javascript
+// PREF: increase size of disk cache
 user_pref("browser.cache.disk.smart_size.enabled", false);
 user_pref("browser.cache.disk.capacity", 1024000);
 user_pref("browser.cache.disk.metadata_memory_limit", 1000);