this fixes #1105

assets/checksums.txt

@@ -5,7 +5,7 @@ f7c529ec45cca5b2a584a2597c2e96a3 assets/ublock/filters.txt
 146704ad1c0393e342afdb416762c183 assets/ublock/badware.txt
 5baa90e2da7cd6a73edff2010557ee57 assets/ublock/redirect.txt
 d6f734c851d5077bd545d0fa39e8bb8d assets/ublock/experimental.txt
-771999096fecd114ef959c4169e7e3f5 assets/ublock/resources.txt
+f5be62339fe301622f09bea4c9c1924b assets/ublock/resources.txt
 6c9d89c5dc6db345de36c8c966fff575 assets/ublock/filter-lists.json
 50573388b525ede1a920cd4b4ee7fbf0 assets/thirdparties/easylist-downloads.adblockplus.org/easyprivacy.txt
 61cc16cf02e034370f0f47bc17c46551 assets/thirdparties/easylist-downloads.adblockplus.org/easylist.txt

assets/ublock/resources.txt

@@ -177,14 +177,40 @@ www.google-analytics.com/ga.js application/javascript
 # "visitor behavior"
 googletagservices.com/gpt.js application/javascript
 (function() {
+    // https://developers.google.com/doubleclick-gpt/reference
     var noopfn = function() {
         ;
     };
     //
+    var slot = {
+        addService: noopfn,
+        setCategoryExclusion: noopfn,
+        setTargeting: noopfn
+    };
+    var slotfn = function() {
+        return slot;
+    };
+    //
+    var pubAdsService = {
+        addEventListener: noopfn,
+        clear: noopfn,
+        enableSyncRendering: noopfn,
+        refresh: noopfn,
+        set: noopfn,
+        setCategoryExclusion: noopfn
+    };
+    //
     var gpt = window.googletag || {};
     gpt._vars_ = gpt._vars_ || {};
     gpt.cmd = gpt.cmd || [];
+    gpt.display = noopfn;
+    gpt.defineSlot = slotfn;
+    gpt.defineOutOfPageSlot = slotfn;
+    gpt.enableServices = noopfn;
     gpt.getVersion = gpt.getVersion || noopfn;
+    gpt.pubads =  function() {
+        return pubAdsService;
+    };
     //
     window.googletag = gpt;
 })();