diff --git a/content.css b/content.css
index eec06b7..beb57a0 100644
--- a/content.css
+++ b/content.css
@@ -61,6 +61,11 @@ html.atm-hide-dismissed .atm-card.atm-dismissed {
   display: none !important;
 }
 
+/* Sponsored / featured listings — fully hidden */
+.atm-sponsored {
+  display: none !important;
+}
+
 /* --- Detail page: floating action button --- */
 
 .atm-fab {
diff --git a/content.js b/content.js
index 027484e..c1eefb2 100644
--- a/content.js
+++ b/content.js
@@ -69,11 +69,39 @@ function extractTitle(card) {
   return h ? h.textContent.trim().slice(0, 200) : "";
 }
 
+// A card is "sponsored/featured" if its detail link carries
+// journey=FEATURED_LISTING_JOURNEY (AutoTrader's own tagging) or it lives
+// inside an explicitly sponsored container.
+function isSponsoredCard(card) {
+  const anchors = card.querySelectorAll('a[href*="/car-details/"]');
+  for (const a of anchors) {
+    const href = a.getAttribute("href") || "";
+    if (/journey=FEATURED_LISTING_JOURNEY/i.test(href)) return true;
+  }
+  const testid = (card.getAttribute("data-testid") || "").toLowerCase();
+  if (testid.includes("featured") || testid.includes("sponsor") || testid.includes("promoted")) {
+    return true;
+  }
+  // Walk up one level to catch wrapper markers
+  const parent = card.parentElement;
+  if (parent) {
+    const ptid = (parent.getAttribute("data-testid") || "").toLowerCase();
+    if (ptid.includes("featured") || ptid.includes("sponsor") || ptid.includes("promoted")) {
+      return true;
+    }
+  }
+  return false;
+}
+
 function findAllCards() {
   // Primary selector — verified stable on autotrader.co.uk
   const lis = document.querySelectorAll('li[data-testid^="id-"]');
   const cards = new Map();
   for (const li of lis) {
+    if (isSponsoredCard(li)) {
+      li.classList.add("atm-sponsored");
+      continue;
+    }
     const id = extractIdFromLi(li);
     if (id) cards.set(li, id);
   }
@@ -153,8 +181,17 @@ function startObserving() {
 // doesn't depend on the page layout, so it's resilient to redesigns.
 
 function getDetailListingId() {
-  const m = location.pathname.match(/^\/car-details\/(\d+)/);
-  return m ? m[1] : null;
+  // Accept /car-details/{id}, /classifieds/advert/{id}, trailing slashes, slugs
+  const patterns = [
+    /^\/car-details\/(\d+)/i,
+    /^\/classifieds\/advert\/(\d+)/i,
+    /\/cars?\/[^/]+\/(\d{10,})/i,
+  ];
+  for (const re of patterns) {
+    const m = location.pathname.match(re);
+    if (m) return m[1];
+  }
+  return null;
 }
 
 function extractDetailTitle() {
@@ -282,6 +319,15 @@ function watchUrlChanges() {
 
 (async function init() {
   await loadState();
+  const detailId = getDetailListingId();
+  // Diagnostic log — open Firefox DevTools console to confirm detection.
+  // Prefixed so you can filter with "ATM" in the console.
+  console.log("[ATM]", {
+    pathname: location.pathname,
+    href: location.href,
+    detectedDetailId: detailId,
+    dismissedCount: Object.keys(state.dismissed).length,
+  });
   applyPageMode();
   watchUrlChanges();
 })();
diff --git a/dist/autotrader-marker-0.1.1.xpi b/dist/autotrader-marker-0.1.1.xpi
new file mode 100644
index 0000000..2af2b06
Binary files /dev/null and b/dist/autotrader-marker-0.1.1.xpi differ
diff --git a/dist/updates.json b/dist/updates.json
index 6a0672d..707e3e6 100644
--- a/dist/updates.json
+++ b/dist/updates.json
@@ -5,6 +5,10 @@
         {
           "version": "0.1.0",
           "update_link": "https://git.nocker.cloud/tony/autotrader-marker/raw/branch/main/dist/autotrader-marker-0.1.0.xpi"
+        },
+        {
+          "version": "0.1.1",
+          "update_link": "https://git.nocker.cloud/tony/autotrader-marker/raw/branch/main/dist/autotrader-marker-0.1.1.xpi"
         }
       ]
     }
diff --git a/manifest.json b/manifest.json
index 958b433..c143e30 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "AutoTrader Marker",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Mark AutoTrader listings as 'not wanted' so you can spot the ones you haven't reviewed yet.",
   "permissions": [
     "storage"
diff --git a/package.json b/package.json
index cff9bb7..42e3aea 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "autotrader-marker",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "private": true,
   "description": "Firefox extension that marks AutoTrader listings as 'not wanted'.",
   "scripts": {