diff --git a/dist/manifest.json b/dist/manifest.json
index 6599e82..2453c01 100644
--- a/dist/manifest.json
+++ b/dist/manifest.json
@@ -1,6 +1,6 @@
 {
     "name": "inboxy: Inbox Bundles for Gmail",
-    "version": "1.5.3",
+    "version": "1.5.4",
     "description": "Adds Google Inbox bundles to Gmail",
     "homepage_url": "https://www.inboxymail.com",
     "background": {
diff --git a/src/bundling/Bundler.js b/src/bundling/Bundler.js
index 4843d6a..af1cea3 100644
--- a/src/bundling/Bundler.js
+++ b/src/bundling/Bundler.js
@@ -55,6 +55,8 @@ class Bundler {
     /**
      * Bundle together the messages on the current page of messages, if they aren't already bundled,
      * optionally reopening the most recently open bundle.
+     *
+     * Returns an object with info for debug printing.
      */
     bundleMessages(reopenRecentBundle) {
         const bundledMail = this.bundledMail;
@@ -64,14 +66,18 @@ class Bundler {
             : null;
 
         if (!messageList) {
-            return;
+            return {
+                foundMessageList: false,
+            };
         }
         
+        let debugInfo = { foundMessageList: true };
+
         this.messageListWatcher.disconnect();
 
         // Only redraw if message list isn't still bundled
         if (!messageList.children[0].classList.contains('is-bundled')) {
-            this._bundleMessages(messageList);
+            debugInfo = this._bundleMessages(messageList);
             messageList.children[0].classList.add('is-bundled');
         }
 
@@ -84,6 +90,8 @@ class Bundler {
         }
 
         this.messageListWatcher.observe();
+
+        return debugInfo;
     }
 
     /**
@@ -91,6 +99,8 @@ class Bundler {
      *
      * Table rows are reordered by using flexbox and the order property, since Gmail's js seems 
      * to require the DOM nodes to remain in their original order. 
+     *
+     * Returns an object with info for debug printing.
      */
     _bundleMessages(messageList) {
         const tableBody = messageList.querySelector(Selectors.TABLE_BODY);
@@ -116,6 +126,11 @@ class Bundler {
 
         this._applyStyles(messageNodes);
         this._attachHandlers(messageNodes, messageList);
+
+        return {
+            numMessages: messageNodes.length,
+            numBundles: Object.keys(bundlesByLabel).length,
+        };
     }
 
     /**
diff --git a/src/content.js b/src/content.js
index cfcd330..46eaf1d 100644
--- a/src/content.js
+++ b/src/content.js
@@ -38,8 +38,16 @@ import {
     isStarredPage,
 } from './util/MessagePageUtils';
 
+const DEBUG = true;
+const logDebugMessage = message => {
+    if (DEBUG) {
+        console.log(`inboxy-debug: ${message}`);
+    }
+};
+
 const html = document.querySelector('html');
 if (html) {
+    logDebugMessage('Applying styles');
     html.classList.add(InboxyClasses.INBOXY);
 }
 
@@ -127,7 +135,9 @@ document.addEventListener('mousedown', e => {
 //
 
 function handleContentLoaded() {
+    logDebugMessage('Handle content loaded event');
     const bundleCurrentPage = supportsBundling(window.location.href);
+    logDebugMessage(`Url: ${window.location.href}, page supports bundling: ${bundleCurrentPage}`);
     tryBundling(0, bundleCurrentPage);
 }
 
@@ -144,6 +154,8 @@ function tryBundling(i, bundleCurrentPage) {
             setTimeout(() => tryBundling(i + 1, bundleCurrentPage), RETRY_TIMEOUT_MS);
         }
         else {
+            logDebugMessage('Start observers');
+
             addPinnedToggle(); 
             startObservers();
 
@@ -163,7 +175,10 @@ function tryBundling(i, bundleCurrentPage) {
             setTimeout(() => tryBundling(i + 1, bundleCurrentPage), RETRY_TIMEOUT_MS);
         }
         else {
-            bundler.bundleMessages(false);
+            logDebugMessage('Bundle messages');
+
+            const debugInfo = bundler.bundleMessages(false);
+            logDebugMessage(JSON.stringify(debugInfo));
             addPinnedToggle();
             startObservers();
         }