diff --git a/README.md b/README.md
index 431fe04..8fe6b27 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
+> [!WARNING]
+> The Chrome team has been working hard to bring the best of the Web Vitals extension directly into the DevTools Performance panel. As of Chrome version 132, which became stable on January 7, 2025, we have finally ended support for the extension and encourage all users to switch to DevTools. Be aware that extension updates will stop and features may break without notice. [Learn more](https://developer.chrome.com/blog/web-vitals-extension)
+
 # Web Vitals Chrome Extension 
 *A Chrome extension to measure metrics for a healthy site* 
 [Install now](https://chrome.google.com/webstore/detail/web-vitals/ahfhijdlegdabablpippeagghigmibma)
diff --git a/manifest.json b/manifest.json
index c401f1f..606ca47 100755
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
   "name": "Web Vitals",
-  "version": "1.5.3",
+  "version": "1.6.0",
   "manifest_version": 3,
   "description": "Measure metrics for a healthy site",
   "homepage_url": "https://web.dev/articles/vitals",
diff --git a/package.json b/package.json
index 61cfd7e..5eeae9f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "web-vitals-extension",
-  "version": "1.5.3",
+  "version": "1.6.0",
   "description": "Instant Web Vitals metrics",
   "main": "src/browser_action/vitals.js",
   "repository": "https://github.com/GoogleChrome/web-vitals-extension",
diff --git a/src/browser_action/core.css b/src/browser_action/core.css
index bc534a0..cc54107 100644
--- a/src/browser_action/core.css
+++ b/src/browser_action/core.css
@@ -395,3 +395,24 @@
 .web-vitals-chrome-extension-popup #settings-link a:hover svg {
   color: blue;
 }
+
+.web-vitals-chrome-extension-popup #eol-notice {
+  border: 4px solid var(--color-needs-improvement);
+  margin: auto 20px;
+  padding: 0 30px;
+  font-size: 1.2rem;
+  line-height: 1.8rem;
+}
+.web-vitals-chrome-extension-popup #eol-notice::backdrop {
+  backdrop-filter: blur(1px);
+}
+.web-vitals-chrome-extension-popup button.danger {
+  background-color: var(--color-needs-improvement);
+  border: none;
+}
+.web-vitals-chrome-extension-popup #eol-notice > :first-child {
+  margin-top: 30px;
+}
+.web-vitals-chrome-extension-popup #eol-notice > :last-child {
+  margin-bottom: 30px;
+}
diff --git a/src/browser_action/crux.js b/src/browser_action/crux.js
index cff6924..6327c8e 100644
--- a/src/browser_action/crux.js
+++ b/src/browser_action/crux.js
@@ -11,7 +11,6 @@ export class CrUX {
     const origin = urlHelper.origin;
 
     return CrUX.query({url, formFactor}).catch(e =>{
-      console.warn('CrUX URL data unavailable', e);
       // If URL data is unavailable, fall back to the origin.
       return CrUX.query({origin, formFactor});
     });
diff --git a/src/browser_action/popup.html b/src/browser_action/popup.html
index 432fc91..4dfe5af 100644
--- a/src/browser_action/popup.html
+++ b/src/browser_action/popup.html
@@ -80,6 +80,19 @@ <h1>Metrics</h1>
 
     </footer>
 
+    <dialog id="eol-notice" popover>
+      <p>
+        As of January 2025, support for the Web Vitals extension has ended.
+        We encourage all users to switch to the DevTools Performance panel instead.
+        <a href="https://developer.chrome.com/blog/web-vitals-extension" target="_blank">Learn more</a>
+      </p>
+
+      <div>
+        <button class="danger" popovertarget="eol-notice" popovertargetaction="hide">I understand</button>
+        <label><input type="checkbox" id="hide-eol-notice">Don't show again</label>
+      </div>
+    </dialog>
+
     <script type="module" src="popup.js"></script>
   </body>
 </html>
diff --git a/src/browser_action/popup.js b/src/browser_action/popup.js
index 08d9c38..894fadf 100644
--- a/src/browser_action/popup.js
+++ b/src/browser_action/popup.js
@@ -44,6 +44,7 @@ class Popup {
     this.initTimestamp();
     this.initMetrics();
     this.initFieldData();
+    this.showEOLNotice();
   }
 
   initStatus() {
@@ -95,11 +96,25 @@ class Popup {
       console.log('CrUX data', fieldData);
       this.renderFieldData(fieldData, formFactor);
     }).catch(e => {
-      console.warn('Unable to load any CrUX data', e);
+      console.warn('Unable to load any CrUX data. See https://developer.chrome.com/blog/web-vitals-extension', e);
       this.setStatus('Local metrics only (field data unavailable)');
     });
   }
 
+  showEOLNotice() {
+    chrome.storage.sync.get({hideEOLNotice: false}, ({hideEOLNotice}) => {
+      if (hideEOLNotice) {
+        return;
+      }
+      const notice = document.getElementById('eol-notice');
+      notice.showPopover();
+      const hideNoticeToggle = document.getElementById('hide-eol-notice');
+      hideNoticeToggle.addEventListener('change', (e) => {
+        chrome.storage.sync.set({hideEOLNotice: e.target.checked});
+      });
+    });
+  }
+
   setStatus(status) {
     const statusElement = document.getElementById('status');
 
diff --git a/src/browser_action/vitals.js b/src/browser_action/vitals.js
index 84aa3a2..614b431 100644
--- a/src/browser_action/vitals.js
+++ b/src/browser_action/vitals.js
@@ -254,6 +254,12 @@
       default:
         formattedValue = secondsFormatter.format(metric.value / 1000);
     }
+
+    // Log the EOL warning at the same time as TTFB, which should only occur once per page load.
+    if (metric.name === 'TTFB') {
+      console.warn(`${LOG_PREFIX} As of January 2025, support for the Web Vitals extension has ended. We encourage all users to switch to the DevTools Performance panel instead. Learn more: https://developer.chrome.com/blog/web-vitals-extension`);
+    }
+
     console.groupCollapsed(
       `${LOG_PREFIX} ${metric.name} %c${formattedValue} (${metric.rating})`,
       `color: ${RATING_COLORS[metric.rating] || 'inherit'}`
diff --git a/src/options/options.html b/src/options/options.html
index ae9ed86..859666f 100644
--- a/src/options/options.html
+++ b/src/options/options.html
@@ -37,6 +37,11 @@
                     <input type="checkbox" id="noBadgeAnimation">
                     Only show overall status in badge (no animation of failing metrics)
                 </label>
+                <br/>
+                <label for="hideEOLNotice">
+                    <input type="checkbox" id="hideEOLNotice">
+                    Never show extension deprecation notice
+                </label> (<a href="https://developer.chrome.com/blog/web-vitals-extension">Learn more</a>)
                 <div id="status"></div>
                 <button id="save">Save</button>
                 </div>
diff --git a/src/options/options.js b/src/options/options.js
index 44f1c59..ec430ae 100644
--- a/src/options/options.js
+++ b/src/options/options.js
@@ -3,6 +3,7 @@ const optionsConsoleLoggingNode = document.getElementById('consoleLogging');
 const optionsNoBadgeAnimation = document.getElementById('noBadgeAnimation');
 const optionsUserTimingNode = document.getElementById('userTiming');
 const optionsPreferPhoneFieldNode = document.getElementById('preferPhoneField');
+const optionsHideEOLNotice = document.getElementById('hideEOLNotice');
 const optionsSaveBtn = document.getElementById('save');
 const optionsStatus = document.getElementById('status');
 
@@ -16,6 +17,7 @@ function saveOptions() {
     userTiming: optionsUserTimingNode.checked,
     preferPhoneField: optionsPreferPhoneFieldNode.checked,
     noBadgeAnimation: optionsNoBadgeAnimation.checked,
+    hideEOLNotice: optionsHideEOLNotice.checked,
   }, () => {
     // Update status to let user know options were saved.
     optionsStatus.textContent = 'Options saved.';
@@ -36,12 +38,14 @@ function restoreOptions() {
     userTiming: false,
     preferPhoneField: false,
     noBadgeAnimation: false,
-  }, ({enableOverlay, debug, userTiming, preferPhoneField, noBadgeAnimation}) => {
+    hideEOLNotice: false,
+  }, ({enableOverlay, debug, userTiming, preferPhoneField, noBadgeAnimation, hideEOLNotice}) => {
     optionsOverlayNode.checked = enableOverlay;
     optionsConsoleLoggingNode.checked = debug;
     optionsUserTimingNode.checked = userTiming;
     optionsPreferPhoneFieldNode.checked = preferPhoneField;
     optionsNoBadgeAnimation.checked = noBadgeAnimation;
+    optionsHideEOLNotice.checked = hideEOLNotice;
   });
 }
 document.addEventListener('DOMContentLoaded', restoreOptions);