Bug 1713696 - Add a SmartBlock shim for AdNexus; r=denschub,webcompat-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D120476

browser/extensions/webcompat/data/shims.js

@@ -97,6 +97,22 @@ const AVAILABLE_SHIMS = [
       "*://example.com/browser/browser/extensions/webcompat/tests/browser/shims_test_3.js",
     ],
   },
+  {
+    id: "AdNexus",
+    platform: "all",
+    name: "AdNexus",
+    bug: "1713696",
+    file: "empty-script.js",
+    matches: [
+      "*://acdn.adnxs.com/ast/ast.js",
+      {
+        patterns: ["*://*.adnxs.com/*/pb.js", "*://*.adnxs.com/*/prebid"],
+        target: "adnexus-prebid.js",
+        types: ["script"],
+      },
+    ],
+    onlyIfBlockedByETP: true,
+  },
   {
     id: "AdSafeProtectedGoogleIMAAdapter",
     platform: "all",

browser/extensions/webcompat/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 2,
   "name": "Web Compatibility Interventions",
   "description": "Urgent post-release fixes for web compatibility.",
-  "version": "24.6.0",
+  "version": "24.7.0",
 
   "applications": {
     "gecko": {
@@ -90,6 +90,7 @@
   },
 
   "web_accessible_resources": [
+    "shims/adnexus-prebid.js",
     "shims/adsafeprotected-ima.js",
     "shims/apstag.js",
     "shims/bmauth.js",

browser/extensions/webcompat/moz.build

@@ -79,6 +79,7 @@ FINAL_TARGET_FILES.features["webcompat@mozilla.org"]["injections"]["js"] += [
 ]
 
 FINAL_TARGET_FILES.features["webcompat@mozilla.org"]["shims"] += [
+    "shims/adnexus-prebid.js",
     "shims/adsafeprotected-ima.js",
     "shims/apstag.js",
     "shims/bmauth.js",

browser/extensions/webcompat/shims/adnexus-prebid.js

@@ -0,0 +1,68 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * Bug 1694401 - Shim Prebid.js
+ *
+ * Some sites rely on prebid.js to place content, perhaps in conjunction with
+ * other services like Google Publisher Tags and Amazon TAM. This shim prevents
+ * site breakage like image galleries breaking as the user browsers them, by
+ * allowing the content placement to succeed.
+ */
+
+if (!window.pbjs?.requestBids) {
+  const que = window.pbjs?.que || [];
+  const cmd = window.pbjs?.cmd || [];
+  const adUnits = window.pbjs?.adUnits || [];
+
+  window.pbjs = {
+    adUnits,
+    addAdUnits(arr) {
+      if (!Array.isArray(arr)) {
+        arr = [arr];
+      }
+      adUnits.push(arr);
+    },
+    cmd,
+    offEvent() {},
+    que,
+    refreshAds() {},
+    removeAdUnit(codes) {
+      if (!Array.isArray(codes)) {
+        codes = [codes];
+      }
+      for (const code of codes) {
+        for (let i = adUnits.length - 1; i >= 0; i--) {
+          if (adUnits[i].code === code) {
+            adUnits.splice(i, 1);
+          }
+        }
+      }
+    },
+    renderAd() {},
+    requestBids(params) {
+      params?.bidsBackHandler?.();
+    },
+    setConfig() {},
+    setTargetingForGPTAsync() {},
+  };
+
+  const push = function(fn) {
+    if (typeof fn === "function") {
+      try {
+        fn();
+      } catch (e) {
+        console.trace(e);
+      }
+    }
+  };
+
+  que.push = push;
+  cmd.push = push;
+
+  que.forEach(push);
+  cmd.forEach(push);
+}