--- a/mobile/android/base/java/org/mozilla/gecko/BrowserApp.java
+++ b/mobile/android/base/java/org/mozilla/gecko/BrowserApp.java
@@ -1202,16 +1202,19 @@ public class BrowserApp extends GeckoApp
                     return;
                 }
 
                 if (itemId == 0) {
                     final String extrasId = res.getResourceEntryName(R.string.contextmenu_edit_bookmark);
                     Telemetry.sendUIEvent(TelemetryContract.Event.ACTION,
                         TelemetryContract.Method.DIALOG, extrasId);
 
+                    // In this case we're allowed to use the bookmark URL (as opposed to id). We know the
+                    // URL uniquely identifies the bookmark as it's just been created (the UI only lets us create
+                    // a new bookmark if a given URL isn't bookmarked anywhere).
                     new EditBookmarkDialog(BrowserApp.this).show(tab.getURL());
                 } else if (itemId == 1) {
                     final String extrasId = res.getResourceEntryName(R.string.contextmenu_add_to_launcher);
                     Telemetry.sendUIEvent(TelemetryContract.Event.ACTION,
                         TelemetryContract.Method.DIALOG, extrasId);
 
                     final String url = tab.getURL();
                     final String title = tab.getDisplayTitle();