diff --git a/claude-spec/05-options.md b/claude-spec/05-options.md
index 81b1747a..b61cd92b 100644
--- a/claude-spec/05-options.md
+++ b/claude-spec/05-options.md
@@ -95,7 +95,7 @@ These are generated programmatically at the bottom of `mzta-options-default.js`
 | `spamfilter_enabled_accounts` | `[]` | Accounts where spam filter is active |
 | `spamfilter_show_msg_panel` | `true` | Show info panel on spam detection |
 | `summarize` | `false` | Enable email summarization |
-| `summarize_auto` | `0` | Auto-summarize mode: `0` = disabled, `1` = manual (show "click to generate" button), `2` = automatic (generate on message open) |
+| `summarize_auto` | `1` | Auto-summarize mode: `0` = disabled, `1` = manual (show "click to generate" button), `2` = automatic (generate on message open) |
 | `summarize_display_mode` | `'inline'` | Where to display summaries: `'inline'` = message pane banner, `'webchat'` = AI chat window. Note: `summarize_auto = 2` always uses inline regardless of this setting. |
 | `summarize_max_display_length` | `0` | Maximum characters shown in inline summary before truncation. `0` = no limit (show full text). When set, text is truncated at a word boundary and a "See more"/"See less" toggle link is shown. |
 
diff --git a/mzta-background.js b/mzta-background.js
index ef9f8d61..29ec2828 100644
--- a/mzta-background.js
+++ b/mzta-background.js
@@ -220,7 +220,9 @@ messenger.runtime.onMessage.addListener((message, sender, sendResponse) => {
                 async function _initSummary() {
                     try {
                         let tabId = sender.tab.id;
-                        let prefs = await browser.storage.sync.get({ summarize_auto: prefs_default.summarize_auto, summarize_display_mode: prefs_default.summarize_display_mode, summarize_max_display_length: prefs_default.summarize_max_display_length });
+                        let prefs = await browser.storage.sync.get({ summarize: prefs_default.summarize, summarize_auto: prefs_default.summarize_auto, summarize_display_mode: prefs_default.summarize_display_mode, summarize_max_display_length: prefs_default.summarize_max_display_length });
+
+                        if (!prefs.summarize) return;
 
                         let message = await browser.messageDisplay.getDisplayedMessage(tabId);
                         if (!message) return;
diff --git a/options/mzta-options-default.js b/options/mzta-options-default.js
index 20dea23d..c7cbfcd8 100644
--- a/options/mzta-options-default.js
+++ b/options/mzta-options-default.js
@@ -137,10 +137,10 @@ export const prefs_default = {
     spamfilter: false,
     spamfilter_threshold: 70,
     spamfilter_enabled_accounts: [],
-    summarize_auto: 0,                   // 0: disabled, 1: manual button, 2: automatic
+    summarize: false,
+    summarize_auto: 1,                   // 0: disabled, 1: manual button, 2: automatic
     summarize_display_mode: 'inline',    // 'inline' or 'webchat'
     summarize_max_display_length: 0,     // 0 = no limit, otherwise max chars shown inline
     spamfilter_show_msg_panel: true,
-    summarize: false,
     ...generated_prefs
 }