Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

57 files changed, 6021 insertions, 0 deletions

diff --git a/browser/extensions/webcompat/shims/addthis-angular.js b/browser/extensions/webcompat/shims/addthis-angular.js
new file mode 100644
index 0000000000..0f0cdd5029
--- /dev/null
+++ b/browser/extensions/webcompat/shims/addthis-angular.js
@@ -0,0 +1,16 @@
+/* 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 1713694 - Shim AddThis Angular module
+ *
+ * Sites using Angular with AddThis can break entirely if the module is
+ * blocked. This shim mitigates that breakage by loading an empty module.
+ */
+
+if (!window.addthisModule) {
+  window.addthisModule = window?.angular?.module("addthis", ["ng"]);
+}
diff --git a/browser/extensions/webcompat/shims/adform.js b/browser/extensions/webcompat/shims/adform.js
new file mode 100644
index 0000000000..d6727d500e
--- /dev/null
+++ b/browser/extensions/webcompat/shims/adform.js
@@ -0,0 +1,30 @@
+/* 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 1713695 - Shim Adform tracking
+ *
+ * Sites such as m.tim.it may gate content behind AdForm's trackpoint,
+ * breaking download links and such if blocked. This shim stubs out the
+ * script and its related tracking pixel, so the content still works.
+ */
+
+if (!window.Adform) {
+  window.Adform = {
+    Opt: {
+      disableRedirect() {},
+      getStatus(clientID, callback) {
+        callback({
+          clientID,
+          errorMessage: undefined,
+          optIn() {},
+          optOut() {},
+          status: "nocookie",
+        });
+      },
+    },
+  };
+}
diff --git a/browser/extensions/webcompat/shims/adnexus-ast.js b/browser/extensions/webcompat/shims/adnexus-ast.js
new file mode 100644
index 0000000000..ae07fa6a03
--- /dev/null
+++ b/browser/extensions/webcompat/shims/adnexus-ast.js
@@ -0,0 +1,210 @@
+/* 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 1734130 - Shim AdNexus AST
+ *
+ * Some sites expect AST to successfully load, or they break.
+ * This shim mitigates that breakage.
+ */
+
+if (!window.apntag?.loaded) {
+  const anq = window.apntag?.anq || [];
+
+  const gTags = new Map();
+  const gAds = new Map();
+  const gEventHandlers = {};
+
+  const Ad = class {
+    adType = "banner";
+    auctionId = "-";
+    banner = {
+      width: 1,
+      height: 1,
+      content: "",
+      trackers: {
+        impression_urls: [],
+        video_events: {},
+      },
+    };
+    brandCategoryId = 0;
+    buyerMemberId = 0;
+    cpm = 0.1;
+    cpm_publisher_currency = 0.1;
+    creativeId = 0;
+    dealId = undefined;
+    height = 1;
+    mediaSubtypeId = 1;
+    mediaTypeId = 1;
+    publisher_currency_code = "US";
+    source = "-";
+    tagId = -1;
+    targetId = "";
+    width = 1;
+
+    constructor(tagId, targetId) {
+      this.tagId = tagId;
+      this.targetId = targetId;
+    }
+  };
+
+  const fireAdEvent = (type, adObj) => {
+    const { targetId } = adObj;
+    const handlers = gEventHandlers[type]?.[targetId];
+    if (!handlers) {
+      return Promise.resolve();
+    }
+    const evt = { adObj, type };
+    return new Promise(done => {
+      setTimeout(() => {
+        for (const cb of handlers) {
+          try {
+            cb(evt);
+          } catch (e) {
+            console.error(e);
+          }
+        }
+        done();
+      }, 1);
+    });
+  };
+
+  const refreshTag = targetId => {
+    const tag = gTags.get(targetId);
+    if (!tag) {
+      return;
+    }
+    if (!gAds.has(targetId)) {
+      gAds.set(targetId, new Ad(tag.tagId, targetId));
+    }
+    const adObj = gAds.get(targetId);
+    fireAdEvent("adRequested", adObj).then(() => {
+      // TODO: do some sites expect adAvailable+adLoaded instead of adNoBid?
+      fireAdEvent("adNoBid", adObj);
+    });
+  };
+
+  const off = (type, targetId, cb) => {
+    gEventHandlers[type]?.[targetId]?.delete(cb);
+  };
+
+  const on = (type, targetId, cb) => {
+    gEventHandlers[type] = gEventHandlers[type] || {};
+    gEventHandlers[type][targetId] =
+      gEventHandlers[type][targetId] || new Set();
+    gEventHandlers[type][targetId].add(cb);
+  };
+
+  const Tag = class {
+    static #nextId = 0;
+    debug = undefined;
+    displayed = false;
+    initialHeight = 1;
+    initialWidth = 1;
+    keywords = {};
+    member = 0;
+    showTagCalled = false;
+    sizes = [];
+    targetId = "";
+    utCalled = true;
+    utDivId = "";
+    utiframeId = "";
+    uuid = "";
+
+    constructor(raw) {
+      const { keywords, sizes, targetId } = raw;
+      this.tagId = Tag.#nextId++;
+      this.keywords = keywords || {};
+      this.sizes = sizes || [];
+      this.targetId = targetId || "";
+    }
+    modifyTag() {}
+    off(type, cb) {
+      off(type, this.targetId, cb);
+    }
+    on(type, cb) {
+      on(type, this.targetId, cb);
+    }
+    setKeywords(kw) {
+      this.keywords = kw;
+    }
+  };
+
+  window.apntag = {
+    anq,
+    attachClickTrackers() {},
+    checkAdAvailable() {},
+    clearPageTargeting() {},
+    clearRequest() {},
+    collapseAd() {},
+    debug: false,
+    defineTag(dfn) {
+      const { targetId } = dfn;
+      if (!targetId) {
+        return;
+      }
+      gTags.set(targetId, new Tag(dfn));
+    },
+    disableDebug() {},
+    dongle: undefined,
+    emitEvent(adObj, type) {
+      fireAdEvent(type, adObj);
+    },
+    enableCookieSet() {},
+    enableDebug() {},
+    fireImpressionTrackers() {},
+    getAdMarkup: () => "",
+    getAdWrap() {},
+    getAstVersion: () => "0.49.0",
+    getPageTargeting() {},
+    getTag(targetId) {
+      return gTags.get(targetId);
+    },
+    handleCb() {},
+    handleMediationBid() {},
+    highlightAd() {},
+    loaded: true,
+    loadTags() {
+      for (const tagName of gTags.keys()) {
+        refreshTag(tagName);
+      }
+    },
+    modifyTag() {},
+    notify() {},
+    offEvent(type, target, cb) {
+      off(type, target, cb);
+    },
+    onEvent(type, target, cb) {
+      on(type, target, cb);
+    },
+    recordErrorEvent() {},
+    refresh() {},
+    registerRenderer() {},
+    requests: {},
+    resizeAd() {},
+    setEndpoint() {},
+    setKeywords() {},
+    setPageOpts() {},
+    setPageTargeting() {},
+    setSafeFrameConfig() {},
+    setSizes() {},
+    showTag() {},
+  };
+
+  const push = function (fn) {
+    if (typeof fn === "function") {
+      try {
+        fn();
+      } catch (e) {
+        console.trace(e);
+      }
+    }
+  };
+
+  anq.push = push;
+
+  anq.forEach(push);
+}
diff --git a/browser/extensions/webcompat/shims/adnexus-prebid.js b/browser/extensions/webcompat/shims/adnexus-prebid.js
new file mode 100644
index 0000000000..f0f810f0e9
--- /dev/null
+++ b/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);
+}
diff --git a/browser/extensions/webcompat/shims/adsafeprotected-ima.js b/browser/extensions/webcompat/shims/adsafeprotected-ima.js
new file mode 100644
index 0000000000..93cd8e1eab
--- /dev/null
+++ b/browser/extensions/webcompat/shims/adsafeprotected-ima.js
@@ -0,0 +1,19 @@
+/* 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";
+
+/**
+ *
+ * Sites relying on Ad Safe Protected's adapter for Google IMA may
+ * have broken videos when the script is blocked. This shim stubs
+ * out the API to help mitigate major breakage.
+ */
+
+if (!window.googleImaVansAdapter) {
+  window.googleImaVansAdapter = {
+    init() {},
+    dispose() {},
+  };
+}
diff --git a/browser/extensions/webcompat/shims/apstag.js b/browser/extensions/webcompat/shims/apstag.js
new file mode 100644
index 0000000000..55be05916b
--- /dev/null
+++ b/browser/extensions/webcompat/shims/apstag.js
@@ -0,0 +1,73 @@
+/* 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 1713698 - Shim Amazon Transparent Ad Marketplace's apstag.js
+ *
+ * Some sites such as politico.com rely on Amazon TAM tracker to serve ads,
+ * breaking functionality like galleries if it is blocked. This shim helps
+ * mitigate major breakage in that case.
+ */
+
+if (!window.apstag?._getSlotIdToNameMapping) {
+  const _Q = window.apstag?._Q || [];
+
+  const newBid = config => {
+    return {
+      amznbid: "",
+      amzniid: "",
+      amznp: "",
+      amznsz: "0x0",
+      size: "0x0",
+      slotID: config.slotID,
+    };
+  };
+
+  window.apstag = {
+    _Q,
+    _getSlotIdToNameMapping() {},
+    bids() {},
+    debug() {},
+    deleteId() {},
+    fetchBids(cfg, cb) {
+      if (!Array.isArray(cfg?.slots)) {
+        return;
+      }
+      setTimeout(() => {
+        cb(cfg.slots.map(s => newBid(s)));
+      }, 1);
+    },
+    init() {},
+    punt() {},
+    renderImp() {},
+    renewId() {},
+    setDisplayBids() {},
+    targetingKeys: () => [],
+    thirdPartyData: {},
+    updateId() {},
+  };
+
+  window.apstagLOADED = true;
+
+  _Q.push = function (prefix, args) {
+    try {
+      switch (prefix) {
+        case "f":
+          window.apstag.fetchBids(...args);
+          break;
+        case "i":
+          window.apstag.init(...args);
+          break;
+      }
+    } catch (e) {
+      console.trace(e);
+    }
+  };
+
+  for (const cmd of _Q) {
+    _Q.push(cmd);
+  }
+}
diff --git a/browser/extensions/webcompat/shims/blogger.js b/browser/extensions/webcompat/shims/blogger.js
new file mode 100644
index 0000000000..a474b3c5e9
--- /dev/null
+++ b/browser/extensions/webcompat/shims/blogger.js
@@ -0,0 +1,39 @@
+/* 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/. */
+
+/* globals exportFunction */
+
+"use strict";
+
+/**
+ * Blogger powered blogs rely on storage access to https://blogger.com to enable
+ * oauth with Google. For dFPI, sites need to use the Storage Access API to gain
+ * first party storage access. This shim calls requestStorageAccess on behalf of
+ * the site when a user wants to log in via oauth.
+ */
+
+console.warn(
+  `When using oauth, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1776869 for details.`
+);
+
+const GOOGLE_OAUTH_PATH_PREFIX = "https://accounts.google.com/ServiceLogin";
+
+// Overwrite the window.open method so we can detect oauth related popups.
+const origOpen = window.wrappedJSObject.open;
+Object.defineProperty(window.wrappedJSObject, "open", {
+  value: exportFunction((url, ...args) => {
+    // Filter oauth popups.
+    if (!url.startsWith(GOOGLE_OAUTH_PATH_PREFIX)) {
+      return origOpen(url, ...args);
+    }
+    // Request storage access for the Blogger iframe.
+    document.requestStorageAccess().then(() => {
+      origOpen(url, ...args);
+    });
+    // We don't have the window object yet which window.open returns, since the
+    // sign-in flow is dependent on the async storage access request. This isn't
+    // a problem as long as the website does not consume it.
+    return null;
+  }, window),
+});
diff --git a/browser/extensions/webcompat/shims/bloggerAccount.js b/browser/extensions/webcompat/shims/bloggerAccount.js
new file mode 100644
index 0000000000..19e80dbfbe
--- /dev/null
+++ b/browser/extensions/webcompat/shims/bloggerAccount.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/. */
+
+/* globals exportFunction */
+
+"use strict";
+
+/**
+ * Blogger uses Google as the auth provider. The account panel uses a
+ * third-party iframe of https://ogs.google.com, which requires first-party
+ * storage access to authenticate. This shim calls requestStorageAccess on
+ * behalf of the site when the user opens the account panel.
+ */
+
+console.warn(
+  `When logging in with Google, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1777690 for details.`
+);
+
+const STORAGE_ACCESS_ORIGIN = "https://ogs.google.com";
+
+document.documentElement.addEventListener(
+  "click",
+  e => {
+    const { target, isTrusted } = e;
+    if (!isTrusted) {
+      return;
+    }
+
+    const anchorEl = target.closest("a");
+    if (!anchorEl) {
+      return;
+    }
+
+    if (
+      !anchorEl.href.startsWith("https://accounts.google.com/SignOutOptions")
+    ) {
+      return;
+    }
+
+    // The storage access request below runs async so the panel won't open
+    // immediately. Mitigate this UX issue by updating the clicked element's
+    // style so the user gets some immediate feedback.
+    anchorEl.style.opacity = 0.5;
+    e.stopPropagation();
+    e.preventDefault();
+
+    document
+      .requestStorageAccessForOrigin(STORAGE_ACCESS_ORIGIN)
+      .then(() => {
+        // Reload all iframes of ogs.google.com so the first-party cookies are
+        // sent to the server.
+        // The reload mechanism here is a bit of a hack, since we don't have
+        // access to the content window of a cross-origin iframe.
+        document
+          .querySelectorAll("iframe[src^='https://ogs.google.com/']")
+          .forEach(frame => (frame.src += ""));
+      })
+      // Show the panel in both success and error state. When the user denies
+      // the storage access prompt they will see an error message in the account
+      // panel.
+      .finally(() => {
+        anchorEl.style.opacity = 1.0;
+        target.click();
+      });
+  },
+  true
+);
diff --git a/browser/extensions/webcompat/shims/bmauth.js b/browser/extensions/webcompat/shims/bmauth.js
new file mode 100644
index 0000000000..944f2100d6
--- /dev/null
+++ b/browser/extensions/webcompat/shims/bmauth.js
@@ -0,0 +1,21 @@
+/* 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";
+
+if (!window.BmAuth) {
+  window.BmAuth = {
+    init: () => new Promise(() => {}),
+    handleSignIn: () => {
+      // TODO: handle this properly!
+    },
+    isAuthenticated: () => Promise.resolve(false),
+    addListener: () => {},
+    api: {
+      event: {
+        addListener: () => {},
+      },
+    },
+  };
+}
diff --git a/browser/extensions/webcompat/shims/branch.js b/browser/extensions/webcompat/shims/branch.js
new file mode 100644
index 0000000000..31e8f4eeec
--- /dev/null
+++ b/browser/extensions/webcompat/shims/branch.js
@@ -0,0 +1,84 @@
+/* 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 1716220 - Shim Branch Web SDK
+ *
+ * Sites such as TataPlay may not load properly if Branch Web SDK is
+ * blocked. This shim stubs out its script so the page still loads.
+ */
+
+if (!window?.branch?.b) {
+  const queue = window?.branch?._q || [];
+  window.branch = new (class {
+    V = {};
+    g = 0;
+    X = "web2.62.0";
+    b = {
+      A: {},
+      clear() {},
+      get() {},
+      getAll() {},
+      isEnabled: () => true,
+      remove() {},
+      set() {},
+      ca() {},
+      g: [],
+      l: 0,
+      o: 0,
+      s: null,
+    };
+    addListener() {}
+    applyCode() {}
+    autoAppIndex() {}
+    banner() {}
+    c() {}
+    closeBanner() {}
+    closeJourney() {}
+    constructor() {}
+    creditHistory() {}
+    credits() {}
+    crossPlatformIds() {}
+    data() {}
+    deepview() {}
+    deepviewCta() {}
+    disableTracking() {}
+    first() {}
+    getBrowserFingerprintId() {}
+    getCode() {}
+    init(key, ...args) {
+      const cb = args.pop();
+      if (typeof cb === "function") {
+        cb(undefined, {});
+      }
+    }
+    lastAttributedTouchData() {}
+    link() {}
+    logEvent() {}
+    logout() {}
+    qrCode() {}
+    redeem() {}
+    referrals() {}
+    removeListener() {}
+    renderFinalize() {}
+    renderQueue() {}
+    sendSMS() {}
+    setAPIResponseCallback() {}
+    setBranchViewData() {}
+    setIdentity() {}
+    track() {}
+    trackCommerceEvent() {}
+    validateCode() {}
+  })();
+  const push = ([fn, ...args]) => {
+    try {
+      window.branch[fn].apply(window.branch, args);
+    } catch (e) {
+      console.error(e);
+    }
+  };
+  queue.forEach(push);
+}
diff --git a/browser/extensions/webcompat/shims/chartbeat.js b/browser/extensions/webcompat/shims/chartbeat.js
new file mode 100644
index 0000000000..0e57fc6da1
--- /dev/null
+++ b/browser/extensions/webcompat/shims/chartbeat.js
@@ -0,0 +1,18 @@
+/* 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 1713699 - Shim ChartBeat tracking
+ *
+ * Sites may rely on chartbeat's tracking as they might with Google Analytics,
+ * expecting it to be present for interactive site content to function. This
+ * shim mitigates related breakage.
+ */
+
+window.pSUPERFLY = {
+  activity() {},
+  virtualPage() {},
+};
diff --git a/browser/extensions/webcompat/shims/crave-ca.js b/browser/extensions/webcompat/shims/crave-ca.js
new file mode 100644
index 0000000000..b4d93ccdfa
--- /dev/null
+++ b/browser/extensions/webcompat/shims/crave-ca.js
@@ -0,0 +1,56 @@
+/* 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 1746439 - crave.ca login broken with dFPI enabled
+ *
+ * Crave.ca relies upon a login page that is out-of-origin. That login page
+ * sets a cookie for https://www.crave.ca, which is then used as an proof of
+ * authentication on redirect back to the main site. This shim adds a request
+ * for storage access for https://www.crave.ca when the user tries to log in.
+ */
+
+console.warn(
+  `When logging in, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1746439 for details.`
+);
+
+// Third-party origin we need to request storage access for.
+const STORAGE_ACCESS_ORIGIN = "https://www.crave.ca";
+
+document.documentElement.addEventListener(
+  "click",
+  e => {
+    const { target, isTrusted } = e;
+    if (!isTrusted) {
+      return;
+    }
+    const button = target.closest("button");
+    if (!button) {
+      return;
+    }
+    const form = target.closest(".login-form");
+    if (!form) {
+      return;
+    }
+
+    console.warn(
+      "Calling the Storage Access API on behalf of " + STORAGE_ACCESS_ORIGIN
+    );
+    button.disabled = true;
+    e.stopPropagation();
+    e.preventDefault();
+    document
+      .requestStorageAccessForOrigin(STORAGE_ACCESS_ORIGIN)
+      .then(() => {
+        button.disabled = false;
+        target.click();
+      })
+      .catch(() => {
+        button.disabled = false;
+      });
+  },
+  true
+);
diff --git a/browser/extensions/webcompat/shims/criteo.js b/browser/extensions/webcompat/shims/criteo.js
new file mode 100644
index 0000000000..afdc00b888
--- /dev/null
+++ b/browser/extensions/webcompat/shims/criteo.js
@@ -0,0 +1,64 @@
+/* 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 1713720 - Shim Criteo
+ *
+ * Sites relying on window.Criteo to be loaded can experience
+ * breakage if it is blocked. Stubbing out the API in a shim can
+ * mitigate this breakage.
+ */
+
+if (window.Criteo?.CallRTA === undefined) {
+  window.Criteo = {
+    CallRTA() {},
+    ComputeStandaloneDFPTargeting() {},
+    DisplayAcceptableAdIfAdblocked() {},
+    DisplayAd() {},
+    GetBids() {},
+    GetBidsForAdUnit() {},
+    Passback: {
+      RequestBids() {},
+      RenderAd() {},
+    },
+    PubTag: {
+      Adapters: {
+        AMP() {},
+        Prebid() {},
+      },
+      Context: {
+        GetIdfs() {},
+        SetIdfs() {},
+      },
+      DirectBidding: {
+        DirectBiddingEvent() {},
+        DirectBiddingSlot() {},
+        DirectBiddingUrlBuilder() {},
+        Size() {},
+      },
+      RTA: {
+        DefaultCrtgContentName: "crtg_content",
+        DefaultCrtgRtaCookieName: "crtg_rta",
+      },
+    },
+    RenderAd() {},
+    RequestBids() {},
+    RequestBidsOnGoogleTagSlots() {},
+    SetCCPAExplicitOptOut() {},
+    SetCeh() {},
+    SetDFPKeyValueTargeting() {},
+    SetLineItemRanges() {},
+    SetPublisherExt() {},
+    SetSlotsExt() {},
+    SetTargeting() {},
+    SetUserExt() {},
+    events: {
+      push() {},
+    },
+    passbackEvents: [],
+    usePrebidEvents: true,
+  };
+}
diff --git a/browser/extensions/webcompat/shims/cxense.js b/browser/extensions/webcompat/shims/cxense.js
new file mode 100644
index 0000000000..55862f4fb5
--- /dev/null
+++ b/browser/extensions/webcompat/shims/cxense.js
@@ -0,0 +1,593 @@
+/* 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 1713721 - Shim Cxense
+ *
+ * Sites relying on window.cX can experience breakage if it is blocked.
+ * Stubbing out the API in a shim can mitigate this breakage. There are
+ * two versions of the API, one including window.cX.CCE, but both appear
+ * to be very similar so we use one shim for both.
+ */
+
+if (window.cX?.getUserSegmentIds === undefined) {
+  const callQueue = window.cX?.callQueue || [];
+  const callQueueCCE = window.cX?.CCE?.callQueue || [];
+
+  function getRandomString(l = 16) {
+    const v = crypto.getRandomValues(new Uint8Array(l));
+    const s = Array.from(v, c => c.toString(16)).join("");
+    return s.slice(0, l);
+  }
+
+  const call = (cb, ...args) => {
+    if (typeof cb !== "function") {
+      return;
+    }
+    try {
+      cb(...args);
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  const invokeOn = lib => {
+    return (fn, ...args) => {
+      try {
+        lib[fn](...args);
+      } catch (e) {
+        console.error(e);
+      }
+    };
+  };
+
+  const userId = getRandomString();
+  const cxUserId = `cx:${getRandomString(25)}:${getRandomString(12)}`;
+  const topLeft = { left: 0, top: 0 };
+  const margins = { left: 0, top: 0, right: 0, bottom: 0 };
+  const ccePushUrl =
+    "https://comcluster.cxense.com/cce/push?callback={{callback}}";
+  const displayWidget = (divId, a, ctx, callback) => call(callback, ctx, divId);
+  const getUserSegmentIds = a => call(a?.callback, a?.defaultValue || []);
+  const init = (a, b, c, d, callback) => call(callback);
+  const render = (a, data, ctx, callback) => call(callback, data, ctx);
+  const run = (params, ctx, callback) => call(callback, params, ctx);
+  const runCtrlVersion = (a, b, callback) => call(callback);
+  const runCxVersion = (a, data, b, ctx, callback) => call(callback, data, ctx);
+  const runTest = (a, divId, b, c, ctx, callback) => call(callback, divId, ctx);
+  const sendConversionEvent = (a, options) => call(options?.callback, {});
+  const sendEvent = (a, b, args) => call(args?.callback, {});
+
+  const getDivId = className => {
+    const e = document.querySelector(`.${className}`);
+    if (e) {
+      return `${className}-01`;
+    }
+    return null;
+  };
+
+  const getDocumentSize = () => {
+    const width = document.body.clientWidth;
+    const height = document.body.clientHeight;
+    return { width, height };
+  };
+
+  const getNowSeconds = () => {
+    return Math.round(new Date().getTime() / 1000);
+  };
+
+  const getPageContext = () => {
+    return {
+      location: location.href,
+      pageViewRandom: "",
+      userId,
+    };
+  };
+
+  const getWindowSize = () => {
+    const width = window.innerWidth;
+    const height = window.innerHeight;
+    return { width, height };
+  };
+
+  const isObject = i => {
+    return typeof i === "object" && i !== null && !Array.isArray(i);
+  };
+
+  const runMulti = widgets => {
+    widgets?.forEach(({ widgetParams, widgetContext, widgetCallback }) => {
+      call(widgetCallback, widgetParams, widgetContext);
+    });
+  };
+
+  let testGroup = -1;
+  let snapPoints = [];
+  const startTime = new Date();
+
+  const library = {
+    addCustomerScript() {},
+    addEventListener() {},
+    addExternalId() {},
+    afterInitializePage() {},
+    allUserConsents() {},
+    backends: {
+      production: {
+        baseAdDeliveryUrl: "http://adserver.cxad.cxense.com/adserver/search",
+        secureBaseAdDeliveryUrl:
+          "https://s-adserver.cxad.cxense.com/adserver/search",
+      },
+      sandbox: {
+        baseAdDeliveryUrl:
+          "http://adserver.sandbox.cxad.cxense.com/adserver/search",
+        secureBaseAdDeliveryUrl:
+          "https://s-adserver.sandbox.cxad.cxense.com/adserver/search",
+      },
+    },
+    calculateAdSpaceSize(adCount, adUnitSize, marginA, marginB) {
+      return adCount * (adUnitSize + marginA + marginB);
+    },
+    cdn: {
+      template: {
+        direct: {
+          http: "http://cdn.cxpublic.com/",
+          https: "https://cdn.cxpublic.com/",
+        },
+        mapped: {
+          http: "http://cdn-templates.cxpublic.com/",
+          https: "https://cdn-templates.cxpublic.com/",
+        },
+      },
+    },
+    cint() {},
+    cleanUpGlobalIds: [],
+    clearBaseUrl: "https://scdn.cxense.com/sclear.html",
+    clearCustomParameters() {},
+    clearIdUrl: "https://scomcluster.cxense.com/public/clearid",
+    clearIds() {},
+    clickTracker: (a, b, callback) => call(callback),
+    clientStorageUrl: "https://clientstorage.cxense.com",
+    combineArgs: () => Object.create(),
+    combineKeywordsIntoArray: () => [],
+    consentClasses: ["pv", "segment", "ad", "recs"],
+    consentClassesV2: ["geo", "device"],
+    cookieSyncRUrl: "csyn-r.cxense.com",
+    createDelegate() {},
+    csdUrls: {
+      domainScriptUrl: "//csd.cxpublic.com/d/",
+      customerScriptUrl: "//csd.cxpublic.com/t/",
+    },
+    cxenseGlobalIdIframeUrl: "https://scdn.cxense.com/sglobal.html",
+    cxenseUserIdUrl: "https://id.cxense.com/public/user/id",
+    decodeUrlEncodedNameValuePairs: () => Object.create(),
+    defaultAdRenderer: () => "",
+    deleteCookie() {},
+    denyWithoutConsent: {
+      addExternalId: "pv",
+      getUserSegmentIds: "segment",
+      insertAdSpace: "ad",
+      insertMultipleAdSpaces: "ad",
+      sendEvent: "pv",
+      sendPageViewEvent: "pv",
+      sync: "ad",
+    },
+    dmpPushUrl: "https://comcluster.cxense.com/dmp/push?callback={{callback}}",
+    emptyWidgetUrl: "https://scdn.cxense.com/empty.html",
+    eventReceiverBaseUrl: "https://scomcluster.cxense.com/Repo/rep.html",
+    eventReceiverBaseUrlGif: "https://scomcluster.cxense.com/Repo/rep.gif",
+    getAllText: () => "",
+    getClientStorageVariable() {},
+    getCookie: () => null,
+    getCxenseUserId: () => cxUserId,
+    getDocumentSize,
+    getElementPosition: () => topLeft,
+    getHashFragment: () => location.hash.substr(1),
+    getLocalStats: () => Object.create(),
+    getNodeValue: n => n.nodeValue,
+    getNowSeconds,
+    getPageContext,
+    getRandomString,
+    getScrollPos: () => topLeft,
+    getSessionId: () => "",
+    getSiteId: () => "",
+    getTimezoneOffset: () => new Date().getTimezoneOffset(),
+    getTopLevelDomain: () => location.hostname,
+    getUserId: () => userId,
+    getUserSegmentIds,
+    getWindowSize,
+    hasConsent: () => true,
+    hasHistory: () => true,
+    hasLocalStorage: () => true,
+    hasPassiveEventListeners: () => true,
+    hasPostMessage: () => true,
+    hasSessionStorage() {},
+    initializePage() {},
+    insertAdSpace() {},
+    insertMultipleAdSpaces() {},
+    insertWidget() {},
+    invoke: invokeOn(library),
+    isAmpIFrame() {},
+    isArray() {},
+    isCompatModeActive() {},
+    isConsentRequired() {},
+    isEdge: () => false,
+    isFirefox: () => true,
+    isIE6Or7: () => false,
+    isObject,
+    isRecsDestination: () => false,
+    isSafari: () => false,
+    isTextNode: n => n?.nodeType === 3,
+    isTopWindow: () => window === top,
+    jsonpRequest: () => false,
+    loadScript() {},
+    m_accountId: "0",
+    m_activityEvents: false,
+    m_activityState: {
+      activeTime: startTime,
+      currScrollLeft: 0,
+      currScrollTop: 0,
+      exitLink: "",
+      hadHIDActivity: false,
+      maxViewLeft: 1,
+      maxViewTop: 1,
+      parentMetrics: undefined,
+      prevActivityTime: startTime + 2,
+      prevScreenX: 0,
+      prevScreenY: 0,
+      prevScrollLeft: 0,
+      prevScrollTop: 0,
+      prevTime: startTime + 1,
+      prevWindowHeight: 1,
+      prevWindowWidth: 1,
+      scrollDepthPercentage: 0,
+      scrollDepthPixels: 0,
+    },
+    m_atfr: null,
+    m_c1xTpWait: 0,
+    m_clientStorage: {
+      iframeEl: null,
+      iframeIsLoaded: false,
+      iframeOrigin: "https://clientstorage.cxense.com",
+      iframePath: "/clientstorage_v2.html",
+      messageContexts: {},
+      messageQueue: [],
+    },
+    m_compatMode: {},
+    m_compatModeActive: false,
+    m_compatPvSent: false,
+    m_consentVersion: 1,
+    m_customParameters: [],
+    m_documentSizeRequestedFromChild: false,
+    m_externalUserIds: [],
+    m_globalIdLoading: {
+      globalIdIFrameEl: null,
+      globalIdIFrameElLoaded: false,
+    },
+    m_isSpaRecsDestination: false,
+    m_knownMessageSources: [],
+    m_p1Complete: false,
+    m_prevLocationHash: "",
+    m_previousPageViewReport: null,
+    m_rawCustomParameters: {},
+    m_rnd: getRandomString(),
+    m_scriptStartTime: startTime,
+    m_siteId: "0",
+    m_spaRecsClickUrl: null,
+    m_thirdPartyIds: true,
+    m_usesConsent: false,
+    m_usesIabConsent: false,
+    m_usesSecureCookies: true,
+    m_usesTcf20Consent: false,
+    m_widgetSpecs: {},
+    Object,
+    onClearIds() {},
+    onFFP1() {},
+    onP1() {},
+    p1BaseUrl: "https://scdn.cxense.com/sp1.html",
+    p1JsUrl: "https://p1cluster.cxense.com/p1.js",
+    parseHashArgs: () => Object.create(),
+    parseMargins: () => margins,
+    parseUrlArgs: () => Object.create(),
+    postMessageToParent() {},
+    publicWidgetDataUrl: "https://api.cxense.com/public/widget/data",
+    removeClientStorageVariable() {},
+    removeEventListener() {},
+    renderContainedImage: () => "<div/>",
+    renderTemplate: () => "<div/>",
+    reportActivity() {},
+    requireActivityEvents() {},
+    requireConsent() {},
+    requireOnlyFirstPartyIds() {},
+    requireSecureCookies() {},
+    requireTcf20() {},
+    sendEvent,
+    sendSpaRecsClick: (a, callback) => call(callback),
+    setAccountId() {},
+    setAllConsentsTo() {},
+    setClientStorageVariable() {},
+    setCompatMode() {},
+    setConsent() {},
+    setCookie() {},
+    setCustomParameters() {},
+    setEventAttributes() {},
+    setGeoPosition() {},
+    setNodeValue() {},
+    setRandomId() {},
+    setRestrictionsToConsentClasses() {},
+    setRetargetingParameters() {},
+    setSiteId() {},
+    setUserProfileParameters() {},
+    setupIabCmp() {},
+    setupTcfApi() {},
+    shouldPollActivity() {},
+    startLocalStats() {},
+    startSessionAnnotation() {},
+    stopAllSessionAnnotations() {},
+    stopSessionAnnotation() {},
+    sync() {},
+    trackAmpIFrame() {},
+    trackElement() {},
+    trim: s => s.trim(),
+    tsridUrl: "https://tsrid.cxense.com/lookup?callback={{callback}}",
+    userSegmentUrl:
+      "https://api.cxense.com/profile/user/segment?callback={{callback}}",
+  };
+
+  const libraryCCE = {
+    "__cx-toolkit__": {
+      isShown: true,
+      data: [],
+    },
+    activeSnapPoint: null,
+    activeWidgets: [],
+    ccePushUrl,
+    clickTracker: () => "",
+    displayResult() {},
+    displayWidget,
+    getDivId,
+    getTestGroup: () => testGroup,
+    init,
+    insertMaster() {},
+    instrumentClickLinks() {},
+    invoke: invokeOn(libraryCCE),
+    noCache: false,
+    offerProductId: null,
+    persistedQueryId: null,
+    prefix: null,
+    previewCampaign: null,
+    previewDiv: null,
+    previewId: null,
+    previewTestId: null,
+    processCxResult() {},
+    render,
+    reportTestImpression() {},
+    run,
+    runCtrlVersion,
+    runCxVersion,
+    runMulti,
+    runTest,
+    sendConversionEvent,
+    sendPageViewEvent: (a, b, c, callback) => call(callback),
+    setSnapPoints(x) {
+      snapPoints = x;
+    },
+    setTestGroup(x) {
+      testGroup = x;
+    },
+    setVisibilityField() {},
+    get snapPoints() {
+      return snapPoints;
+    },
+    startTime,
+    get testGroup() {
+      return testGroup;
+    },
+    testVariant: null,
+    trackTime: 0.5,
+    trackVisibility() {},
+    updateRecsClickUrls() {},
+    utmParams: [],
+    version: "2.42",
+    visibilityField: "timeHalf",
+  };
+
+  const CCE = {
+    activeSnapPoint: null,
+    activeWidgets: [],
+    callQueue: callQueueCCE,
+    ccePushUrl,
+    clickTracker: () => "",
+    displayResult() {},
+    displayWidget,
+    getDivId,
+    getTestGroup: () => testGroup,
+    init,
+    insertMaster() {},
+    instrumentClickLinks() {},
+    invoke: invokeOn(libraryCCE),
+    library: libraryCCE,
+    noCache: false,
+    offerProductId: null,
+    persistedQueryId: null,
+    prefix: null,
+    previewCampaign: null,
+    previewDiv: null,
+    previewId: null,
+    previewTestId: null,
+    processCxResult() {},
+    render,
+    reportTestImpression() {},
+    run,
+    runCtrlVersion,
+    runCxVersion,
+    runMulti,
+    runTest,
+    sendConversionEvent,
+    sendPageViewEvent: (a, b, c, callback) => call(callback),
+    setSnapPoints(x) {
+      snapPoints = x;
+    },
+    setTestGroup(x) {
+      testGroup = x;
+    },
+    setVisibilityField() {},
+    get snapPoints() {
+      return snapPoints;
+    },
+    startTime,
+    get testGroup() {
+      return testGroup;
+    },
+    testVariant: null,
+    trackTime: 0.5,
+    trackVisibility() {},
+    updateRecsClickUrls() {},
+    utmParams: [],
+    version: "2.42",
+    visibilityField: "timeHalf",
+  };
+
+  window.cX = {
+    addCustomerScript() {},
+    addEventListener() {},
+    addExternalId() {},
+    afterInitializePage() {},
+    allUserConsents: () => undefined,
+    Array,
+    calculateAdSpaceSize: () => 0,
+    callQueue,
+    CCE,
+    cint: () => undefined,
+    clearCustomParameters() {},
+    clearIds() {},
+    clickTracker: () => "",
+    combineArgs: () => Object.create(),
+    combineKeywordsIntoArray: () => [],
+    createDelegate() {},
+    decodeUrlEncodedNameValuePairs: () => Object.create(),
+    defaultAdRenderer: () => "",
+    deleteCookie() {},
+    getAllText: () => "",
+    getClientStorageVariable() {},
+    getCookie: () => null,
+    getCxenseUserId: () => cxUserId,
+    getDocumentSize,
+    getElementPosition: () => topLeft,
+    getHashFragment: () => location.hash.substr(1),
+    getLocalStats: () => Object.create(),
+    getNodeValue: n => n.nodeValue,
+    getNowSeconds,
+    getPageContext,
+    getRandomString,
+    getScrollPos: () => topLeft,
+    getSessionId: () => "",
+    getSiteId: () => "",
+    getTimezoneOffset: () => new Date().getTimezoneOffset(),
+    getTopLevelDomain: () => location.hostname,
+    getUserId: () => userId,
+    getUserSegmentIds,
+    getWindowSize,
+    hasConsent: () => true,
+    hasHistory: () => true,
+    hasLocalStorage: () => true,
+    hasPassiveEventListeners: () => true,
+    hasPostMessage: () => true,
+    hasSessionStorage() {},
+    initializePage() {},
+    insertAdSpace() {},
+    insertMultipleAdSpaces() {},
+    insertWidget() {},
+    invoke: invokeOn(library),
+    isAmpIFrame() {},
+    isArray() {},
+    isCompatModeActive() {},
+    isConsentRequired() {},
+    isEdge: () => false,
+    isFirefox: () => true,
+    isIE6Or7: () => false,
+    isObject,
+    isRecsDestination: () => false,
+    isSafari: () => false,
+    isTextNode: n => n?.nodeType === 3,
+    isTopWindow: () => window === top,
+    JSON,
+    jsonpRequest: () => false,
+    library,
+    loadScript() {},
+    Object,
+    onClearIds() {},
+    onFFP1() {},
+    onP1() {},
+    parseHashArgs: () => Object.create(),
+    parseMargins: () => margins,
+    parseUrlArgs: () => Object.create(),
+    postMessageToParent() {},
+    removeClientStorageVariable() {},
+    removeEventListener() {},
+    renderContainedImage: () => "<div/>",
+    renderTemplate: () => "<div/>",
+    reportActivity() {},
+    requireActivityEvents() {},
+    requireConsent() {},
+    requireOnlyFirstPartyIds() {},
+    requireSecureCookies() {},
+    requireTcf20() {},
+    sendEvent,
+    sendPageViewEvent: (a, callback) => call(callback, {}),
+    sendSpaRecsClick() {},
+    setAccountId() {},
+    setAllConsentsTo() {},
+    setClientStorageVariable() {},
+    setCompatMode() {},
+    setConsent() {},
+    setCookie() {},
+    setCustomParameters() {},
+    setEventAttributes() {},
+    setGeoPosition() {},
+    setNodeValue() {},
+    setRandomId() {},
+    setRestrictionsToConsentClasses() {},
+    setRetargetingParameters() {},
+    setSiteId() {},
+    setUserProfileParameters() {},
+    setupIabCmp() {},
+    setupTcfApi() {},
+    shouldPollActivity() {},
+    startLocalStats() {},
+    startSessionAnnotation() {},
+    stopAllSessionAnnotations() {},
+    stopSessionAnnotation() {},
+    sync() {},
+    trackAmpIFrame() {},
+    trackElement() {},
+    trim: s => s.trim(),
+  };
+
+  window.cxTest = window.cX;
+
+  window.cx_pollActiveTime = () => undefined;
+  window.cx_pollActivity = () => undefined;
+  window.cx_pollFragmentMessage = () => undefined;
+
+  const execQueue = (lib, queue) => {
+    return () => {
+      const invoke = invokeOn(lib);
+      setTimeout(() => {
+        queue.push = cmd => {
+          setTimeout(() => invoke(...cmd), 1);
+        };
+        for (const cmd of queue) {
+          invoke(...cmd);
+        }
+      }, 25);
+    };
+  };
+
+  window.cx_callQueueExecute = execQueue(library, callQueue);
+  window.cxCCE_callQueueExecute = execQueue(libraryCCE, callQueueCCE);
+
+  window.cx_callQueueExecute();
+  window.cxCCE_callQueueExecute();
+}
diff --git a/browser/extensions/webcompat/shims/doubleverify.js b/browser/extensions/webcompat/shims/doubleverify.js
new file mode 100644
index 0000000000..7eaf945d77
--- /dev/null
+++ b/browser/extensions/webcompat/shims/doubleverify.js
@@ -0,0 +1,36 @@
+/* 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 1771557 - Shim DoubleVerify analytics
+ *
+ * Some sites such as Sports Illustrated expect DoubleVerify's
+ * analytics script to load, otherwise odd breakage may occur.
+ * This shim helps mitigate such breakage.
+ */
+
+if (!window?.PQ?.loaded) {
+  const cmd = [];
+  cmd.push = function (c) {
+    try {
+      c?.();
+    } catch (_) {}
+  };
+
+  window.apntag = {
+    anq: [],
+  };
+
+  window.PQ = {
+    cmd,
+    loaded: true,
+    getTargeting: (_, cb) => cb?.([]),
+    init: () => {},
+    loadSignals: (_, cb) => cb?.(),
+    loadSignalsForSlots: (_, cb) => cb?.(),
+    PTS: {},
+  };
+}
diff --git a/browser/extensions/webcompat/shims/eluminate.js b/browser/extensions/webcompat/shims/eluminate.js
new file mode 100644
index 0000000000..3fa65c048c
--- /dev/null
+++ b/browser/extensions/webcompat/shims/eluminate.js
@@ -0,0 +1,95 @@
+/* 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 1606448 - Shim CoreMetrics Eluminate analytics
+ *
+ * Sites may rely on eluminate.js tracking in ways which cause breakage,
+ * which has been seen on shopping sites such as Vans.com, where the
+ * search filtering UX is broken. This shim mitigates such breakage.
+ */
+
+if (!window.CM_DDX) {
+  window.CM_DDX = {
+    domReadyFired: false,
+    headScripts: true,
+    dispatcherLoadRequested: false,
+    firstPassFunctionBinding: false,
+    BAD_PAGE_ID_ELAPSED_TIMEOUT: 5000,
+    version: -1,
+    standalone: false,
+    test: {
+      syndicate: true,
+      testCounter: "",
+      doTest: false,
+      newWin: false,
+      process: () => {},
+    },
+    partner: {},
+    invokeFunctionWhenAvailable: a => {
+      a();
+    },
+    gup: d => "",
+    privacy: {
+      isDoNotTrackEnabled: () => false,
+      setDoNotTrack: () => {},
+      getDoNotTrack: () => false,
+    },
+    setSubCookie: () => {},
+  };
+  const noopfn = () => {};
+  const w = window;
+  w.cmAddShared = noopfn;
+  w.cmCalcSKUString = noopfn;
+  w.cmCreateManualImpressionTag = noopfn;
+  w.cmCreateManualLinkClickTag = noopfn;
+  w.cmCreateManualPageviewTag = noopfn;
+  w.cmCreateOrderTag = noopfn;
+  w.cmCreatePageviewTag = noopfn;
+  w.cmExecuteTagQueue = noopfn;
+  w.cmRetrieveUserID = noopfn;
+  w.cmSetClientID = noopfn;
+  w.cmSetCurrencyCode = noopfn;
+  w.cmSetFirstPartyIDs = noopfn;
+  w.cmSetSubCookie = noopfn;
+  w.cmSetupCookieMigration = noopfn;
+  w.cmSetupNormalization = noopfn;
+  w.cmSetupOther = noopfn;
+  w.cmStartTagSet = noopfn;
+  w.cmCreateConversionEventTag = noopfn;
+  w.cmCreateDefaultPageviewTag = noopfn;
+  w.cmCreateElementTag = noopfn;
+  w.cmCreateManualImpressionTag = noopfn;
+  w.cmCreateManualLinkClickTag = noopfn;
+  w.cmCreateManualPageviewTag = noopfn;
+  w.cmCreatePageElementTag = noopfn;
+  w.cmCreatePageviewTag = noopfn;
+  w.cmCreateProductElementTag = noopfn;
+  w.cmCreateProductviewTag = noopfn;
+  w.cmCreateTechPropsTag = noopfn;
+  w.cmLoadIOConfig = noopfn;
+  w.cmSetClientID = noopfn;
+  w.cmSetCurrencyCode = noopfn;
+  w.cmSetFirstPartyIDs = noopfn;
+  w.cmSetupCookieMigration = noopfn;
+  w.cmSetupNormalization = noopfn;
+
+  w.cmSetupOther = b => {
+    for (const a in b) {
+      window[a] = b[a];
+    }
+  };
+
+  const techProps = {};
+
+  w.coremetrics = {
+    cmLastReferencedPageID: "",
+    cmLoad: noopfn,
+    cmUpdateConfig: noopfn,
+    getTechProps: () => techProps,
+    isDef: c => typeof c !== "undefined" && c,
+  };
+}
diff --git a/browser/extensions/webcompat/shims/empty-script.js b/browser/extensions/webcompat/shims/empty-script.js
new file mode 100644
index 0000000000..d01f2ab537
--- /dev/null
+++ b/browser/extensions/webcompat/shims/empty-script.js
@@ -0,0 +1,5 @@
+/* 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/. */
+
+/* This script is intentionally empty */
diff --git a/browser/extensions/webcompat/shims/empty-shim.txt b/browser/extensions/webcompat/shims/empty-shim.txt
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/browser/extensions/webcompat/shims/empty-shim.txt
diff --git a/browser/extensions/webcompat/shims/everest.js b/browser/extensions/webcompat/shims/everest.js
new file mode 100644
index 0000000000..259ab9033e
--- /dev/null
+++ b/browser/extensions/webcompat/shims/everest.js
@@ -0,0 +1,171 @@
+/* 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 1728114 - Shim Adobe EverestJS
+ *
+ * Sites assuming EverestJS will load can break if it is blocked.
+ * This shim mitigates that breakage.
+ */
+
+if (!window.__ql) {
+  window.__ql = {};
+}
+
+if (!window.EF) {
+  const AdCloudLocalStorage = {
+    get: (_, cb) => cb(),
+    isInitDone: true,
+    isInitSuccess: true,
+  };
+
+  const emptyObj = {};
+
+  const nullSrc = {
+    getHosts: () => [undefined],
+    getProtocols: () => [undefined],
+    hash: {},
+    hashParamsOrder: [],
+    host: undefined,
+    path: [],
+    port: undefined,
+    query: {},
+    queryDelimiter: "&",
+    queryParamsOrder: [],
+    queryPrefix: "?",
+    queryWithoutEncode: {},
+    respectEmptyQueryParamValue: undefined,
+    scheme: undefined,
+    text: "//",
+    userInfo: undefined,
+  };
+
+  const pixelDetailsEvent = {
+    addToDom() {},
+    canAddToDom: () => false,
+    fire() {},
+    getDomElement() {},
+    initializeUri() {},
+    pixelDetailsReceiver() {},
+    scheme: "https:",
+    uri: nullSrc,
+    userid: 0,
+  };
+
+  window.EF = {
+    AdCloudLocalStorage,
+    accessTopUrl: 0,
+    acquireCookieMatchingSlot() {},
+    addListener() {},
+    addPixelDetailsReadyListener() {},
+    addToDom() {},
+    allow3rdPartyPixels: 1,
+    appData: "",
+    appendDictionary() {},
+    checkGlobalSid() {},
+    checkUrlParams() {},
+    cmHost: "cm.everesttech.net",
+    context: {
+      isFbApp: () => 0,
+      isPageview: () => false,
+      isSegmentation: () => false,
+      isTransaction: () => false,
+    },
+    conversionData: "",
+    cookieMatchingSlots: 1,
+    debug: 0,
+    deserializeUrlParams: () => emptyObj,
+    doCookieMatching() {},
+    ef_itp_ls: false,
+    eventType: "",
+    executeAfterLoad() {},
+    executeOnloadCallbacks() {},
+    expectedTrackingParams: ["ev_cl", "ev_sid"],
+    fbIsApp: 0,
+    fbsCM: 0,
+    fbsPixelId: 0,
+    filterList: () => [],
+    getArrayIndex: -1,
+    getConversionData: () => "",
+    getConversionDataFromLocalStorage: cb => cb(),
+    getDisplayClickUri: () => "",
+    getEpochFromEfUniq: () => 0,
+    getFirstLevelObjectCopy: () => emptyObj,
+    getInvisibleIframeElement() {},
+    getInvisibleImageElement() {},
+    getMacroSubstitutedText: () => "",
+    getPixelDetails: cb => cb({}),
+    getScriptElement() {},
+    getScriptSrc: () => "",
+    getServerParams: () => emptyObj,
+    getSortedAttributes: () => [],
+    getTrackingParams: () => emptyObj,
+    getTransactionParams: () => emptyObj,
+    handleConversionData() {},
+    impressionProperties: "",
+    impressionTypes: ["impression", "impression_served"],
+    inFloodlight: 0,
+    init(config) {
+      try {
+        const { userId } = config;
+        window.EF.userId = userId;
+        pixelDetailsEvent.userId = userId;
+      } catch (_) {}
+    },
+    initializeEFVariables() {},
+    isArray: a => Array.isArray(a),
+    isEmptyDictionary: () => true,
+    isITPEnabled: () => false,
+    isPermanentCookieSet: () => false,
+    isSearchClick: () => 0,
+    isXSSReady() {},
+    jsHost: "www.everestjs.net",
+    jsTagAdded: 0,
+    location: nullSrc,
+    locationHref: nullSrc,
+    locationSkipBang: nullSrc,
+    log() {},
+    main() {},
+    main2() {},
+    newCookieMatchingEvent: () => emptyObj,
+    newFbsCookieMatching: () => emptyObj,
+    newImpression: () => emptyObj,
+    newPageview: () => emptyObj,
+    newPixelDetails: () => emptyObj,
+    newPixelEvent: () => emptyObj,
+    newPixelServerDisplayClickRedirectUri: () => emptyObj,
+    newPixelServerGenericRedirectUri: () => emptyObj,
+    newPixelServerUri: () => emptyObj,
+    newProductSegment: () => emptyObj,
+    newSegmentJavascript: () => emptyObj,
+    newTransaction: () => emptyObj,
+    newUri: () => emptyObj,
+    onloadCallbacks: [],
+    pageViewProperties: "",
+    pageviewProperties: "",
+    pixelDetails: {},
+    pixelDetailsAdded: 1,
+    pixelDetailsEvent,
+    pixelDetailsParams: [],
+    pixelDetailsReadyCallbackFns: [],
+    pixelDetailsRecieverCalled: 1,
+    pixelHost: "pixel.everesttech.net",
+    protocol: document?.location?.protocol || "",
+    referrer: nullSrc,
+    removeListener() {},
+    searchSegment: "",
+    segment: "",
+    serverParamsListener() {},
+    sid: 0,
+    sku: "",
+    throttleCookie: "",
+    trackingJavascriptSrc: nullSrc,
+    transactionObjectList: [],
+    transactionProperties: "",
+    userServerParams: {},
+    userid: 0,
+  };
+}
diff --git a/browser/extensions/webcompat/shims/facebook-sdk.js b/browser/extensions/webcompat/shims/facebook-sdk.js
new file mode 100644
index 0000000000..1e995ff047
--- /dev/null
+++ b/browser/extensions/webcompat/shims/facebook-sdk.js
@@ -0,0 +1,554 @@
+/* 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 1226498 - Shim Facebook SDK
+ *
+ * This shim provides functionality to enable Facebook's authenticator on third
+ * party sites ("continue/log in with Facebook" buttons). This includes rendering
+ * the button as the SDK would, if sites require it. This way, if users wish to
+ * opt into the Facebook login process regardless of the tracking consequences,
+ * they only need to click the button as usual.
+ *
+ * In addition, the shim also attempts to provide placeholders for Facebook
+ * videos, which users may click to opt into seeing the video (also despite
+ * the increased tracking risks). This is an experimental feature enabled
+ * that is only currently enabled on nightly builds.
+ *
+ * Finally, this shim also stubs out as much of the SDK as possible to prevent
+ * breaking on sites which expect that it will always successfully load.
+ */
+
+if (!window.FB) {
+  const FacebookLogoURL = "https://smartblock.firefox.etp/facebook.svg";
+  const PlayIconURL = "https://smartblock.firefox.etp/play.svg";
+
+  const originalUrl = document.currentScript.src;
+
+  let haveUnshimmed;
+  let initInfo;
+  let activeOnloginAttribute;
+  const placeholdersToRemoveOnUnshim = new Set();
+  const loggedGraphApiCalls = [];
+  const eventHandlers = new Map();
+
+  function getGUID() {
+    const v = crypto.getRandomValues(new Uint8Array(20));
+    return Array.from(v, c => c.toString(16)).join("");
+  }
+
+  const sendMessageToAddon = (function () {
+    const shimId = "FacebookSDK";
+    const pendingMessages = new Map();
+    const channel = new MessageChannel();
+    channel.port1.onerror = console.error;
+    channel.port1.onmessage = event => {
+      const { messageId, response } = event.data;
+      const resolve = pendingMessages.get(messageId);
+      if (resolve) {
+        pendingMessages.delete(messageId);
+        resolve(response);
+      }
+    };
+    function reconnect() {
+      const detail = {
+        pendingMessages: [...pendingMessages.values()],
+        port: channel.port2,
+        shimId,
+      };
+      window.dispatchEvent(new CustomEvent("ShimConnects", { detail }));
+    }
+    window.addEventListener("ShimHelperReady", reconnect);
+    reconnect();
+    return function (message) {
+      const messageId = getGUID();
+      return new Promise(resolve => {
+        const payload = { message, messageId, shimId };
+        pendingMessages.set(messageId, resolve);
+        channel.port1.postMessage(payload);
+      });
+    };
+  })();
+
+  const isNightly = sendMessageToAddon("getOptions").then(opts => {
+    return opts.releaseBranch === "nightly";
+  });
+
+  function makeLoginPlaceholder(target) {
+    // Sites may provide their own login buttons, or rely on the Facebook SDK
+    // to render one for them. For the latter case, we provide placeholders
+    // which try to match the examples and documentation here:
+    // https://developers.facebook.com/docs/facebook-login/web/login-button/
+
+    if (target.textContent || target.hasAttribute("fb-xfbml-state")) {
+      return;
+    }
+    target.setAttribute("fb-xfbml-state", "");
+
+    const size = target.getAttribute("data-size") || "large";
+
+    let font, margin, minWidth, maxWidth, height, iconHeight;
+    if (size === "small") {
+      font = 11;
+      margin = 8;
+      minWidth = maxWidth = 200;
+      height = 20;
+      iconHeight = 12;
+    } else if (size === "medium") {
+      font = 13;
+      margin = 8;
+      minWidth = 200;
+      maxWidth = 320;
+      height = 28;
+      iconHeight = 16;
+    } else {
+      font = 16;
+      minWidth = 240;
+      maxWidth = 400;
+      margin = 12;
+      height = 40;
+      iconHeight = 24;
+    }
+
+    const wattr = target.getAttribute("data-width") || "";
+    const width =
+      wattr === "100%" ? wattr : `${parseFloat(wattr) || minWidth}px`;
+
+    const round = target.getAttribute("data-layout") === "rounded" ? 20 : 4;
+
+    const text =
+      target.getAttribute("data-button-type") === "continue_with"
+        ? "Continue with Facebook"
+        : "Log in with Facebook";
+
+    const button = document.createElement("div");
+    button.style = `
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      padding-left: ${margin + iconHeight}px;
+      ${width};
+      min-width: ${minWidth}px;
+      max-width: ${maxWidth}px;
+      height: ${height}px;
+      border-radius: ${round}px;
+      -moz-text-size-adjust: none;
+      -moz-user-select: none;
+      color: #fff;
+      font-size: ${font}px;
+      font-weight: bold;
+      font-family: Helvetica, Arial, sans-serif;
+      letter-spacing: .25px;
+      background-color: #1877f2;
+      background-repeat: no-repeat;
+      background-position: ${margin}px 50%;
+      background-size: ${iconHeight}px ${iconHeight}px;
+      background-image: url(${FacebookLogoURL});
+    `;
+    button.textContent = text;
+    target.appendChild(button);
+    target.addEventListener("click", () => {
+      activeOnloginAttribute = target.getAttribute("onlogin");
+    });
+  }
+
+  async function makeVideoPlaceholder(target) {
+    // For videos, we provide a more generic placeholder of roughly the
+    // expected size with a play button, as well as a Facebook logo.
+    if (!(await isNightly) || target.hasAttribute("fb-xfbml-state")) {
+      return;
+    }
+    target.setAttribute("fb-xfbml-state", "");
+
+    let width = parseInt(target.getAttribute("data-width"));
+    let height = parseInt(target.getAttribute("data-height"));
+    if (height) {
+      height = `${width * 0.6}px`;
+    } else {
+      height = `100%; min-height:${width * 0.75}px`;
+    }
+    if (width) {
+      width = `${width}px`;
+    } else {
+      width = `100%; min-width:200px`;
+    }
+
+    const placeholder = document.createElement("div");
+    placeholdersToRemoveOnUnshim.add(placeholder);
+    placeholder.style = `
+      width: ${width};
+      height: ${height};
+      top: 0px;
+      left: 0px;
+      background: #000;
+      color: #fff;
+      text-align: center;
+      cursor: pointer;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      background-image: url(${FacebookLogoURL}), url(${PlayIconURL});
+      background-position: calc(100% - 24px) 24px, 50% 47.5%;
+      background-repeat: no-repeat, no-repeat;
+      background-size: 43px 42px, 25% 25%;
+      -moz-text-size-adjust: none;
+      -moz-user-select: none;
+      color: #fff;
+      align-items: center;
+      padding-top: 200px;
+      font-size: 14pt;
+    `;
+    placeholder.textContent = "Click to allow blocked Facebook content";
+    placeholder.addEventListener("click", evt => {
+      if (!evt.isTrusted) {
+        return;
+      }
+      allowFacebookSDK(() => {
+        placeholdersToRemoveOnUnshim.forEach(p => p.remove());
+      });
+    });
+
+    target.innerHTML = "";
+    target.appendChild(placeholder);
+  }
+
+  // We monitor for XFBML objects as Facebook SDK does, so we
+  // can provide placeholders for dynamically-added ones.
+  const xfbmlObserver = new MutationObserver(mutations => {
+    for (let { addedNodes, target, type } of mutations) {
+      const nodes = type === "attributes" ? [target] : addedNodes;
+      for (const node of nodes) {
+        if (node?.classList?.contains("fb-login-button")) {
+          makeLoginPlaceholder(node);
+        }
+        if (node?.classList?.contains("fb-video")) {
+          makeVideoPlaceholder(node);
+        }
+      }
+    }
+  });
+
+  xfbmlObserver.observe(document.documentElement, {
+    childList: true,
+    subtree: true,
+    attributes: true,
+    attributeFilter: ["class"],
+  });
+
+  const needPopup =
+    !/app_runner/.test(window.name) && !/iframe_canvas/.test(window.name);
+  const popupName = getGUID();
+  let activePopup;
+
+  if (needPopup) {
+    const oldWindowOpen = window.open;
+    window.open = function (href, name, params) {
+      try {
+        const url = new URL(href, window.location.href);
+        if (
+          url.protocol === "https:" &&
+          (url.hostname === "m.facebook.com" ||
+            url.hostname === "www.facebook.com") &&
+          url.pathname.endsWith("/oauth")
+        ) {
+          name = popupName;
+        }
+      } catch (e) {
+        console.error(e);
+      }
+      return oldWindowOpen.call(window, href, name, params);
+    };
+  }
+
+  let allowingFacebookPromise;
+
+  async function allowFacebookSDK(postInitCallback) {
+    if (allowingFacebookPromise) {
+      return allowingFacebookPromise;
+    }
+
+    let resolve, reject;
+    allowingFacebookPromise = new Promise((_resolve, _reject) => {
+      resolve = _resolve;
+      reject = _reject;
+    });
+
+    await sendMessageToAddon("optIn");
+
+    xfbmlObserver.disconnect();
+
+    const shim = window.FB;
+    window.FB = undefined;
+
+    // We need to pass the site's initialization info to the real
+    // SDK as it loads, so we use the fbAsyncInit mechanism to
+    // do so, also ensuring our own post-init callbacks are called.
+    const oldInit = window.fbAsyncInit;
+    window.fbAsyncInit = () => {
+      try {
+        if (typeof initInfo !== "undefined") {
+          window.FB.init(initInfo);
+        } else if (oldInit) {
+          oldInit();
+        }
+      } catch (e) {
+        console.error(e);
+      }
+
+      // Also re-subscribe any SDK event listeners as early as possible.
+      for (const [name, fns] of eventHandlers.entries()) {
+        for (const fn of fns) {
+          window.FB.Event.subscribe(name, fn);
+        }
+      }
+
+      // Allow the shim to do any post-init work early as well, while the
+      // SDK script finishes loading and we ask it to re-parse XFBML etc.
+      postInitCallback?.();
+    };
+
+    const script = document.createElement("script");
+    script.src = originalUrl;
+
+    script.addEventListener("error", () => {
+      allowingFacebookPromise = null;
+      script.remove();
+      activePopup?.close();
+      window.FB = shim;
+      reject();
+      alert("Failed to load Facebook SDK; please try again");
+    });
+
+    script.addEventListener("load", () => {
+      haveUnshimmed = true;
+
+      // After the real SDK has fully loaded we re-issue any Graph API
+      // calls the page is waiting on, as well as requesting for it to
+      // re-parse any XBFML elements (including ones with placeholders).
+
+      for (const args of loggedGraphApiCalls) {
+        try {
+          window.FB.api.apply(window.FB, args);
+        } catch (e) {
+          console.error(e);
+        }
+      }
+
+      window.FB.XFBML.parse(document.body, resolve);
+    });
+
+    document.head.appendChild(script);
+
+    return allowingFacebookPromise;
+  }
+
+  function buildPopupParams() {
+    // We try to match Facebook's popup size reasonably closely.
+    const { outerWidth, outerHeight, screenX, screenY } = window;
+    const { width, height } = window.screen;
+    const w = Math.min(width, 400);
+    const h = Math.min(height, 400);
+    const ua = navigator.userAgent;
+    const isMobile = ua.includes("Mobile") || ua.includes("Tablet");
+    const left = screenX + (screenX < 0 ? width : 0) + (outerWidth - w) / 2;
+    const top = screenY + (screenY < 0 ? height : 0) + (outerHeight - h) / 2.5;
+    let params = `left=${left},top=${top},width=${w},height=${h},scrollbars=1,toolbar=0,location=1`;
+    if (!isMobile) {
+      params = `${params},width=${w},height=${h}`;
+    }
+    return params;
+  }
+
+  // If a page stores the window.FB reference of the shim, then we
+  // want to have it proxy calls to the real SDK once we've unshimmed.
+  function ensureProxiedToUnshimmed(obj) {
+    const shim = {};
+    for (const key in obj) {
+      const value = obj[key];
+      if (typeof value === "function") {
+        shim[key] = function () {
+          if (haveUnshimmed) {
+            return window.FB[key].apply(window.FB, arguments);
+          }
+          return value.apply(this, arguments);
+        };
+      } else if (typeof value !== "object" || value === null) {
+        shim[key] = value;
+      } else {
+        shim[key] = ensureProxiedToUnshimmed(value);
+      }
+    }
+    return new Proxy(shim, {
+      get: (shimmed, key) => (haveUnshimmed ? window.FB : shimmed)[key],
+    });
+  }
+
+  window.FB = ensureProxiedToUnshimmed({
+    api() {
+      loggedGraphApiCalls.push(arguments);
+    },
+    AppEvents: {
+      activateApp() {},
+      clearAppVersion() {},
+      clearUserID() {},
+      EventNames: {
+        ACHIEVED_LEVEL: "fb_mobile_level_achieved",
+        ADDED_PAYMENT_INFO: "fb_mobile_add_payment_info",
+        ADDED_TO_CART: "fb_mobile_add_to_cart",
+        ADDED_TO_WISHLIST: "fb_mobile_add_to_wishlist",
+        COMPLETED_REGISTRATION: "fb_mobile_complete_registration",
+        COMPLETED_TUTORIAL: "fb_mobile_tutorial_completion",
+        INITIATED_CHECKOUT: "fb_mobile_initiated_checkout",
+        PAGE_VIEW: "fb_page_view",
+        RATED: "fb_mobile_rate",
+        SEARCHED: "fb_mobile_search",
+        SPENT_CREDITS: "fb_mobile_spent_credits",
+        UNLOCKED_ACHIEVEMENT: "fb_mobile_achievement_unlocked",
+        VIEWED_CONTENT: "fb_mobile_content_view",
+      },
+      getAppVersion: () => "",
+      getUserID: () => "",
+      logEvent() {},
+      logPageView() {},
+      logPurchase() {},
+      ParameterNames: {
+        APP_USER_ID: "_app_user_id",
+        APP_VERSION: "_appVersion",
+        CONTENT_ID: "fb_content_id",
+        CONTENT_TYPE: "fb_content_type",
+        CURRENCY: "fb_currency",
+        DESCRIPTION: "fb_description",
+        LEVEL: "fb_level",
+        MAX_RATING_VALUE: "fb_max_rating_value",
+        NUM_ITEMS: "fb_num_items",
+        PAYMENT_INFO_AVAILABLE: "fb_payment_info_available",
+        REGISTRATION_METHOD: "fb_registration_method",
+        SEARCH_STRING: "fb_search_string",
+        SUCCESS: "fb_success",
+      },
+      setAppVersion() {},
+      setUserID() {},
+      updateUserProperties() {},
+    },
+    Canvas: {
+      getHash: () => "",
+      getPageInfo(cb) {
+        cb?.call(this, {
+          clientHeight: 1,
+          clientWidth: 1,
+          offsetLeft: 0,
+          offsetTop: 0,
+          scrollLeft: 0,
+          scrollTop: 0,
+        });
+      },
+      Plugin: {
+        hidePluginElement() {},
+        showPluginElement() {},
+      },
+      Prefetcher: {
+        COLLECT_AUTOMATIC: 0,
+        COLLECT_MANUAL: 1,
+        addStaticResource() {},
+        setCollectionMode() {},
+      },
+      scrollTo() {},
+      setAutoGrow() {},
+      setDoneLoading() {},
+      setHash() {},
+      setSize() {},
+      setUrlHandler() {},
+      startTimer() {},
+      stopTimer() {},
+    },
+    Event: {
+      subscribe(e, f) {
+        if (!eventHandlers.has(e)) {
+          eventHandlers.set(e, new Set());
+        }
+        eventHandlers.get(e).add(f);
+      },
+      unsubscribe(e, f) {
+        eventHandlers.get(e)?.delete(f);
+      },
+    },
+    frictionless: {
+      init() {},
+      isAllowed: () => false,
+    },
+    gamingservices: {
+      friendFinder() {},
+      uploadImageToMediaLibrary() {},
+    },
+    getAccessToken: () => null,
+    getAuthResponse() {
+      return { status: "" };
+    },
+    getLoginStatus(cb) {
+      cb?.call(this, { status: "unknown" });
+    },
+    getUserID() {},
+    init(_initInfo) {
+      initInfo = _initInfo; // in case the site is not using fbAsyncInit
+    },
+    login(cb, opts) {
+      // We have to load Facebook's script, and then wait for it to call
+      // window.open. By that time, the popup blocker will likely trigger.
+      // So we open a popup now with about:blank, and then make sure FB
+      // will re-use that same popup later.
+      if (needPopup) {
+        activePopup = window.open("about:blank", popupName, buildPopupParams());
+      }
+      allowFacebookSDK(() => {
+        activePopup = undefined;
+        function runPostLoginCallbacks() {
+          try {
+            cb?.apply(this, arguments);
+          } catch (e) {
+            console.error(e);
+          }
+          if (activeOnloginAttribute) {
+            setTimeout(activeOnloginAttribute, 1);
+            activeOnloginAttribute = undefined;
+          }
+        }
+        window.FB.login(runPostLoginCallbacks, opts);
+      }).catch(() => {
+        activePopup = undefined;
+        activeOnloginAttribute = undefined;
+        try {
+          cb?.({});
+        } catch (e) {
+          console.error(e);
+        }
+      });
+    },
+    logout(cb) {
+      cb?.call(this);
+    },
+    ui(params, fn) {
+      if (params.method === "permissions.oauth") {
+        window.FB.login(fn, params);
+      }
+    },
+    XFBML: {
+      parse(node, cb) {
+        node = node || document;
+        node.querySelectorAll(".fb-login-button").forEach(makeLoginPlaceholder);
+        node.querySelectorAll(".fb-video").forEach(makeVideoPlaceholder);
+        try {
+          cb?.call(this);
+        } catch (e) {
+          console.error(e);
+        }
+      },
+    },
+  });
+
+  window.FB.XFBML.parse();
+
+  window?.fbAsyncInit?.();
+}
diff --git a/browser/extensions/webcompat/shims/facebook.svg b/browser/extensions/webcompat/shims/facebook.svg
new file mode 100644
index 0000000000..df63700a9e
--- /dev/null
+++ b/browser/extensions/webcompat/shims/facebook.svg
@@ -0,0 +1,3 @@
+<!-- copyright is dedicated to the Public Domain.
+     https://en.wikipedia.org/wiki/File:Facebook_f_logo_(2019).svg -->
+<svg xmlns="http://www.w3.org/2000/svg" width="1365.12" height="1365.12" viewBox="0 0 14222 14222"><circle cx="7111" cy="7112" r="7111" fill="#fff"/><path d="M9879 9168l315-2056H8222V5778c0-562 275-1111 1159-1111h897V2917s-814-139-1592-139c-1624 0-2686 984-2686 2767v1567H4194v2056h1806v4969c362 57 733 86 1111 86s749-30 1111-86V9168z" fill="#1977f3"/></svg>
diff --git a/browser/extensions/webcompat/shims/fastclick.js b/browser/extensions/webcompat/shims/fastclick.js
new file mode 100644
index 0000000000..ad6814c995
--- /dev/null
+++ b/browser/extensions/webcompat/shims/fastclick.js
@@ -0,0 +1,75 @@
+/* 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 1738220 - Shim Conversant FastClick
+ *
+ * Sites assuming FastClick will load can break if it is blocked.
+ * This shim mitigates that breakage.
+ */
+
+// FastClick bundles nodeJS packages/core-js/internals/dom-iterables.js
+// which is known to be needed by at least one site.
+if (!HTMLCollection.prototype.forEach) {
+  const DOMIterables = [
+    "CSSRuleList",
+    "CSSStyleDeclaration",
+    "CSSValueList",
+    "ClientRectList",
+    "DOMRectList",
+    "DOMStringList",
+    "DOMTokenList",
+    "DataTransferItemList",
+    "FileList",
+    "HTMLAllCollection",
+    "HTMLCollection",
+    "HTMLFormElement",
+    "HTMLSelectElement",
+    "MediaList",
+    "MimeTypeArray",
+    "NamedNodeMap",
+    "NodeList",
+    "PaintRequestList",
+    "Plugin",
+    "PluginArray",
+    "SVGLengthList",
+    "SVGNumberList",
+    "SVGPathSegList",
+    "SVGPointList",
+    "SVGStringList",
+    "SVGTransformList",
+    "SourceBufferList",
+    "StyleSheetList",
+    "TextTrackCueList",
+    "TextTrackList",
+    "TouchList",
+  ];
+
+  const forEach = Array.prototype.forEach;
+
+  const handlePrototype = proto => {
+    if (!proto || proto.forEach === forEach) {
+      return;
+    }
+    try {
+      Object.defineProperty(proto, "forEach", {
+        enumerable: false,
+        get: () => forEach,
+      });
+    } catch (_) {
+      proto.forEach = forEach;
+    }
+  };
+
+  for (const name of DOMIterables) {
+    handlePrototype(window[name]?.prototype);
+  }
+}
+
+if (!window.conversant?.launch) {
+  const c = (window.conversant = window.conversant || {});
+  c.launch = () => {};
+}
diff --git a/browser/extensions/webcompat/shims/firebase.js b/browser/extensions/webcompat/shims/firebase.js
new file mode 100644
index 0000000000..8ac049c5e4
--- /dev/null
+++ b/browser/extensions/webcompat/shims/firebase.js
@@ -0,0 +1,95 @@
+/* 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 1767407 - Shim Firebase
+ *
+ * Sites relying on firebase-messaging.js will break in Private
+ * browsing mode because it assumes that they require service
+ * workers and indexedDB, when they generally do not.
+ */
+
+/* globals cloneInto */
+
+(function () {
+  const win = window.wrappedJSObject;
+  const emptyObj = new win.Object();
+  const emptyArr = new win.Array();
+  const emptyMsg = cloneInto({ message: "" }, window);
+  const noOpFn = cloneInto(function () {}, window, { cloneFunctions: true });
+
+  if (!win.indexedDB) {
+    const idb = {
+      open: () => win.Promise.reject(emptyMsg),
+    };
+
+    Object.defineProperty(win, "indexedDB", {
+      value: cloneInto(idb, window, { cloneFunctions: true }),
+    });
+  }
+
+  // bug 1778993
+  for (const name of [
+    "IDBCursor",
+    "IDBDatabase",
+    "IDBIndex",
+    "IDBOpenDBRequest",
+    "IDBRequest",
+    "IDBTransaction",
+  ]) {
+    if (!win[name]) {
+      Object.defineProperty(win, name, { value: emptyObj });
+    }
+  }
+
+  if (!win.serviceWorker) {
+    const sw = {
+      addEventListener() {},
+      getRegistrations: () => win.Promise.resolve(emptyArr),
+      register: () => win.Promise.reject(emptyMsg),
+    };
+
+    Object.defineProperty(navigator.wrappedJSObject, "serviceWorker", {
+      value: cloneInto(sw, window, { cloneFunctions: true }),
+    });
+
+    // bug 1779536
+    Object.defineProperty(navigator.wrappedJSObject.serviceWorker, "ready", {
+      value: new win.Promise(noOpFn),
+    });
+  }
+
+  // bug 1750699
+  if (!win.PushManager) {
+    Object.defineProperty(win, "PushManager", { value: emptyObj });
+  }
+
+  // bug 1750699
+  if (!win.PushSubscription) {
+    const ps = {
+      prototype: {
+        getKey() {},
+      },
+    };
+
+    Object.defineProperty(win, "PushSubscription", {
+      value: cloneInto(ps, window, { cloneFunctions: true }),
+    });
+  }
+
+  // bug 1750699
+  if (!win.ServiceWorkerRegistration) {
+    const swr = {
+      prototype: {
+        showNotification() {},
+      },
+    };
+
+    Object.defineProperty(win, "ServiceWorkerRegistration", {
+      value: cloneInto(swr, window, { cloneFunctions: true }),
+    });
+  }
+})();
diff --git a/browser/extensions/webcompat/shims/google-ads.js b/browser/extensions/webcompat/shims/google-ads.js
new file mode 100644
index 0000000000..a432186f43
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-ads.js
@@ -0,0 +1,77 @@
+/* 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 1713726 - Shim Ads by Google
+ *
+ * Sites relying on window.adsbygoogle may encounter breakage if it is blocked.
+ * This shim provides a stub for that API to mitigate that breakage.
+ */
+
+if (window.adsbygoogle?.loaded === undefined) {
+  window.adsbygoogle = {
+    loaded: true,
+    push() {},
+  };
+}
+
+if (window.gapi?._pl === undefined) {
+  const stub = {
+    go() {},
+    render: () => "",
+  };
+  window.gapi = {
+    _pl: true,
+    additnow: stub,
+    autocomplete: stub,
+    backdrop: stub,
+    blogger: stub,
+    commentcount: stub,
+    comments: stub,
+    community: stub,
+    donation: stub,
+    family_creation: stub,
+    follow: stub,
+    hangout: stub,
+    health: stub,
+    interactivepost: stub,
+    load() {},
+    logutil: {
+      enableDebugLogging() {},
+    },
+    page: stub,
+    partnersbadge: stub,
+    person: stub,
+    platform: {
+      go() {},
+    },
+    playemm: stub,
+    playreview: stub,
+    plus: stub,
+    plusone: stub,
+    post: stub,
+    profile: stub,
+    ratingbadge: stub,
+    recobar: stub,
+    savetoandroidpay: stub,
+    savetodrive: stub,
+    savetowallet: stub,
+    share: stub,
+    sharetoclassroom: stub,
+    shortlists: stub,
+    signin: stub,
+    signin2: stub,
+    surveyoptin: stub,
+    visibility: stub,
+    youtube: stub,
+    ytsubscribe: stub,
+    zoomableimage: stub,
+  };
+}
+
+for (const e of document.querySelectorAll("ins.adsbygoogle")) {
+  e.style.maxWidth = "0px";
+}
diff --git a/browser/extensions/webcompat/shims/google-analytics-and-tag-manager.js b/browser/extensions/webcompat/shims/google-analytics-and-tag-manager.js
new file mode 100644
index 0000000000..8809fca8ec
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-analytics-and-tag-manager.js
@@ -0,0 +1,187 @@
+/* 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 1713687 - Shim Google Analytics and Tag Manager
+ *
+ * Sites often rely on the Google Analytics window object and will
+ * break if it fails to load or is blocked. This shim works around
+ * such breakage.
+ *
+ * Sites also often use the Google Optimizer (asynchide) code snippet,
+ * only for it to cause multi-second delays if Google Analytics does
+ * not load. This shim also avoids such delays.
+ *
+ * They also rely on Google Tag Manager, which often goes hand-in-
+ * hand with Analytics, but is not always blocked by anti-tracking
+ * lists. Handling both in the same shim handles both cases.
+ */
+
+if (window[window.GoogleAnalyticsObject || "ga"]?.loaded === undefined) {
+  const DEFAULT_TRACKER_NAME = "t0";
+
+  const trackers = new Map();
+
+  const run = function (fn, ...args) {
+    if (typeof fn === "function") {
+      try {
+        fn(...args);
+      } catch (e) {
+        console.error(e);
+      }
+    }
+  };
+
+  const create = (id, cookie, name, opts) => {
+    id = id || opts?.trackerId;
+    if (!id) {
+      return undefined;
+    }
+    cookie = cookie || opts?.cookieDomain || "_ga";
+    name = name || opts?.name || DEFAULT_TRACKER_NAME;
+    if (!trackers.has(name)) {
+      let props;
+      try {
+        props = new Map(Object.entries(opts));
+      } catch (_) {
+        props = new Map();
+      }
+      trackers.set(name, {
+        get(p) {
+          if (p === "name") {
+            return name;
+          } else if (p === "trackingId") {
+            return id;
+          } else if (p === "cookieDomain") {
+            return cookie;
+          }
+          return props.get(p);
+        },
+        ma() {},
+        requireSync() {},
+        send() {},
+        set(p, v) {
+          if (typeof p !== "object") {
+            p = Object.fromEntries([[p, v]]);
+          }
+          for (const k in p) {
+            props.set(k, p[k]);
+            if (k === "hitCallback") {
+              run(p[k]);
+            }
+          }
+        },
+      });
+    }
+    return trackers.get(name);
+  };
+
+  const cmdRE = /((?<name>.*?)\.)?((?<plugin>.*?):)?(?<method>.*)/;
+
+  function ga(cmd, ...args) {
+    if (arguments.length === 1 && typeof cmd === "function") {
+      run(cmd, trackers.get(DEFAULT_TRACKER_NAME));
+      return undefined;
+    }
+
+    if (typeof cmd !== "string") {
+      return undefined;
+    }
+
+    const groups = cmdRE.exec(cmd)?.groups;
+    if (!groups) {
+      console.error("Could not parse GA command", cmd);
+      return undefined;
+    }
+
+    let { name, plugin, method } = groups;
+
+    if (plugin) {
+      return undefined;
+    }
+
+    if (cmd === "set") {
+      trackers.get(name)?.set(args[0], args[1]);
+    }
+
+    if (method === "remove") {
+      trackers.delete(name);
+      return undefined;
+    }
+
+    if (cmd === "send") {
+      run(args.at(-1)?.hitCallback);
+      return undefined;
+    }
+
+    if (method === "create") {
+      let id, cookie, fields;
+      for (const param of args.slice(0, 4)) {
+        if (typeof param === "object") {
+          fields = param;
+          break;
+        }
+        if (id === undefined) {
+          id = param;
+        } else if (cookie === undefined) {
+          cookie = param;
+        } else {
+          name = param;
+        }
+      }
+      return create(id, cookie, name, fields);
+    }
+
+    return undefined;
+  }
+
+  Object.assign(ga, {
+    create: (a, b, c, d) => ga("create", a, b, c, d),
+    getAll: () => Array.from(trackers.values()),
+    getByName: name => trackers.get(name),
+    loaded: true,
+    remove: t => ga("remove", t),
+  });
+
+  // Process any GA command queue the site pre-declares (bug 1736850)
+  const q = window[window.GoogleAnalyticsObject || "ga"]?.q;
+  window[window.GoogleAnalyticsObject || "ga"] = ga;
+
+  if (Array.isArray(q)) {
+    const push = o => {
+      ga(...o);
+      return true;
+    };
+    q.push = push;
+    q.forEach(o => push(o));
+  }
+
+  // Also process the Google Tag Manager dataLayer (bug 1713688)
+  const dl = window.dataLayer;
+
+  if (Array.isArray(dl) && !dl.find(e => e["gtm.start"])) {
+    const push = function (o) {
+      setTimeout(() => run(o?.eventCallback), 1);
+      return true;
+    };
+    dl.push = push;
+    dl.forEach(o => push(o));
+  }
+
+  // Run dataLayer.hide.end to handle asynchide (bug 1628151)
+  run(window.dataLayer?.hide?.end);
+}
+
+if (!window?.gaplugins?.Linker) {
+  window.gaplugins = window.gaplugins || {};
+  window.gaplugins.Linker = class {
+    autoLink() {}
+    decorate(url) {
+      return url;
+    }
+    passthrough() {}
+  };
+}
diff --git a/browser/extensions/webcompat/shims/google-analytics-ecommerce-plugin.js b/browser/extensions/webcompat/shims/google-analytics-ecommerce-plugin.js
new file mode 100644
index 0000000000..60b49df120
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-analytics-ecommerce-plugin.js
@@ -0,0 +1,13 @@
+/* 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";
+
+if (!window.gaplugins) {
+  window.gaplugins = {};
+}
+
+if (!window.gaplugins.EC) {
+  window.gaplugins.EC = () => {};
+}
diff --git a/browser/extensions/webcompat/shims/google-analytics-legacy.js b/browser/extensions/webcompat/shims/google-analytics-legacy.js
new file mode 100644
index 0000000000..da1a638e12
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-analytics-legacy.js
@@ -0,0 +1,137 @@
+/* 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/. */
+
+// based on https://github.com/gorhill/uBlock/blob/6f49e079db0262e669b70f4169924f796ac8db7c/src/web_accessible_resources/google-analytics_ga.js
+
+"use strict";
+
+if (!window._gaq) {
+  function noopfn() {}
+
+  const gaq = {
+    Na: noopfn,
+    O: noopfn,
+    Sa: noopfn,
+    Ta: noopfn,
+    Va: noopfn,
+    _createAsyncTracker: noopfn,
+    _getAsyncTracker: noopfn,
+    _getPlugin: noopfn,
+    push: a => {
+      if (typeof a === "function") {
+        a();
+        return;
+      }
+      if (!Array.isArray(a)) {
+        return;
+      }
+      if (
+        typeof a[0] === "string" &&
+        /(^|\.)_link$/.test(a[0]) &&
+        typeof a[1] === "string"
+      ) {
+        window.location.assign(a[1]);
+      }
+      if (
+        a[0] === "_set" &&
+        a[1] === "hitCallback" &&
+        typeof a[2] === "function"
+      ) {
+        a[2]();
+      }
+    },
+  };
+
+  const tracker = {
+    _addIgnoredOrganic: noopfn,
+    _addIgnoredRef: noopfn,
+    _addItem: noopfn,
+    _addOrganic: noopfn,
+    _addTrans: noopfn,
+    _clearIgnoredOrganic: noopfn,
+    _clearIgnoredRef: noopfn,
+    _clearOrganic: noopfn,
+    _cookiePathCopy: noopfn,
+    _deleteCustomVar: noopfn,
+    _getName: noopfn,
+    _setAccount: noopfn,
+    _getAccount: noopfn,
+    _getClientInfo: noopfn,
+    _getDetectFlash: noopfn,
+    _getDetectTitle: noopfn,
+    _getLinkerUrl: a => a,
+    _getLocalGifPath: noopfn,
+    _getServiceMode: noopfn,
+    _getVersion: noopfn,
+    _getVisitorCustomVar: noopfn,
+    _initData: noopfn,
+    _link: noopfn,
+    _linkByPost: noopfn,
+    _setAllowAnchor: noopfn,
+    _setAllowHash: noopfn,
+    _setAllowLinker: noopfn,
+    _setCampContentKey: noopfn,
+    _setCampMediumKey: noopfn,
+    _setCampNameKey: noopfn,
+    _setCampNOKey: noopfn,
+    _setCampSourceKey: noopfn,
+    _setCampTermKey: noopfn,
+    _setCampaignCookieTimeout: noopfn,
+    _setCampaignTrack: noopfn,
+    _setClientInfo: noopfn,
+    _setCookiePath: noopfn,
+    _setCookiePersistence: noopfn,
+    _setCookieTimeout: noopfn,
+    _setCustomVar: noopfn,
+    _setDetectFlash: noopfn,
+    _setDetectTitle: noopfn,
+    _setDomainName: noopfn,
+    _setLocalGifPath: noopfn,
+    _setLocalRemoteServerMode: noopfn,
+    _setLocalServerMode: noopfn,
+    _setReferrerOverride: noopfn,
+    _setRemoteServerMode: noopfn,
+    _setSampleRate: noopfn,
+    _setSessionTimeout: noopfn,
+    _setSiteSpeedSampleRate: noopfn,
+    _setSessionCookieTimeout: noopfn,
+    _setVar: noopfn,
+    _setVisitorCookieTimeout: noopfn,
+    _trackEvent: noopfn,
+    _trackPageLoadTime: noopfn,
+    _trackPageview: noopfn,
+    _trackSocial: noopfn,
+    _trackTiming: noopfn,
+    _trackTrans: noopfn,
+    _visitCode: noopfn,
+  };
+
+  const gat = {
+    _anonymizeIP: noopfn,
+    _createTracker: noopfn,
+    _forceSSL: noopfn,
+    _getPlugin: noopfn,
+    _getTracker: () => tracker,
+    _getTrackerByName: () => tracker,
+    _getTrackers: noopfn,
+    aa: noopfn,
+    ab: noopfn,
+    hb: noopfn,
+    la: noopfn,
+    oa: noopfn,
+    pa: noopfn,
+    u: noopfn,
+  };
+
+  window._gat = gat;
+
+  const aa = window._gaq || [];
+  if (Array.isArray(aa)) {
+    while (aa[0]) {
+      gaq.push(aa.shift());
+    }
+  }
+
+  window._gaq = gaq.qf = gaq;
+}
diff --git a/browser/extensions/webcompat/shims/google-ima.js b/browser/extensions/webcompat/shims/google-ima.js
new file mode 100644
index 0000000000..1f5e56239d
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-ima.js
@@ -0,0 +1,620 @@
+/* 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/. */
+
+/**
+ * Bug 1713690 - Shim Google Interactive Media Ads ima3.js
+ *
+ * Many sites use ima3.js for ad bidding and placement, often in conjunction
+ * with Google Publisher Tags, Prebid.js and/or other scripts. This shim
+ * provides a stubbed-out version of the API which helps work around related
+ * site breakage, such as black bxoes where videos ought to be placed.
+ */
+
+if (!window.google?.ima?.VERSION) {
+  const VERSION = "3.517.2";
+
+  const CheckCanAutoplay = (function () {
+    // Sourced from: https://searchfox.org/mozilla-central/source/dom/media/gtest/negative_duration.mp4
+    const TEST_VIDEO = new Blob(
+      [
+        new Uint32Array([
+          469762048, 1887007846, 1752392036, 0, 913273705, 1717987696,
+          828601953, -1878917120, 1987014509, 1811939328, 1684567661, 0, 0, 0,
+          -402456576, 0, 256, 1, 0, 0, 256, 0, 0, 0, 256, 0, 0, 0, 64, 0, 0, 0,
+          0, 0, 0, 33554432, -201261056, 1801548404, 1744830464, 1684564852,
+          251658241, 0, 0, 0, 0, 16777216, 0, -1, -1, 0, 0, 0, 0, 256, 0, 0, 0,
+          256, 0, 0, 0, 64, 5, 53250, -2080309248, 1634296941, 738197504,
+          1684563053, 1, 0, 0, 0, 0, -2137614336, -1, -1, 50261, 754974720,
+          1919706216, 0, 0, 1701079414, 0, 0, 0, 1701079382, 1851869295,
+          1919249508, 16777216, 1852402979, 102, 1752004116, 100, 1, 0, 0,
+          1852400676, 102, 1701995548, 102, 0, 1, 1819440396, 32, 1, 1651799011,
+          108, 1937011607, 100, 0, 1, 1668702599, 49, 0, 1, 0, 0, 0, 33555712,
+          4718800, 4718592, 0, 65536, 0, 0, 0, 0, 0, 0, 0, 0, 16776984,
+          1630601216, 21193590, -14745500, 1729626337, -1407254428, 89161945,
+          1049019, 9453056, -251611125, 27269507, -379058688, -1329024392,
+          268435456, 1937011827, 0, 0, 268435456, 1668510835, 0, 0, 335544320,
+          2054386803, 0, 0, 0, 268435456, 1868788851, 0, 0, 671088640,
+          2019915373, 536870912, 2019914356, 0, 16777216, 16777216, 0, 0, 0,
+        ]),
+      ],
+      { type: "video/mp4" }
+    );
+
+    let testVideo = undefined;
+
+    return function () {
+      if (!testVideo) {
+        testVideo = document.createElement("video");
+        testVideo.style =
+          "position:absolute; width:0; height:0; left:0; right:0; z-index:-1; border:0";
+        testVideo.setAttribute("muted", "muted");
+        testVideo.setAttribute("playsinline", "playsinline");
+        testVideo.src = URL.createObjectURL(TEST_VIDEO);
+        document.body.appendChild(testVideo);
+      }
+      return testVideo.play();
+    };
+  })();
+
+  let ima = {};
+
+  class AdDisplayContainer {
+    destroy() {}
+    initialize() {}
+  }
+
+  class ImaSdkSettings {
+    #c = true;
+    #f = {};
+    #i = false;
+    #l = "";
+    #p = "";
+    #r = 0;
+    #t = "";
+    #v = "";
+    getCompanionBackfill() {}
+    getDisableCustomPlaybackForIOS10Plus() {
+      return this.#i;
+    }
+    getFeatureFlags() {
+      return this.#f;
+    }
+    getLocale() {
+      return this.#l;
+    }
+    getNumRedirects() {
+      return this.#r;
+    }
+    getPlayerType() {
+      return this.#t;
+    }
+    getPlayerVersion() {
+      return this.#v;
+    }
+    getPpid() {
+      return this.#p;
+    }
+    isCookiesEnabled() {
+      return this.#c;
+    }
+    setAutoPlayAdBreaks() {}
+    setCompanionBackfill() {}
+    setCookiesEnabled(c) {
+      this.#c = !!c;
+    }
+    setDisableCustomPlaybackForIOS10Plus(i) {
+      this.#i = !!i;
+    }
+    setFeatureFlags(f) {
+      this.#f = f;
+    }
+    setLocale(l) {
+      this.#l = l;
+    }
+    setNumRedirects(r) {
+      this.#r = r;
+    }
+    setPlayerType(t) {
+      this.#t = t;
+    }
+    setPlayerVersion(v) {
+      this.#v = v;
+    }
+    setPpid(p) {
+      this.#p = p;
+    }
+    setSessionId(s) {}
+    setVpaidAllowed(a) {}
+    setVpaidMode(m) {}
+  }
+  ImaSdkSettings.CompanionBackfillMode = {
+    ALWAYS: "always",
+    ON_MASTER_AD: "on_master_ad",
+  };
+  ImaSdkSettings.VpaidMode = {
+    DISABLED: 0,
+    ENABLED: 1,
+    INSECURE: 2,
+  };
+
+  class EventHandler {
+    #listeners = new Map();
+
+    _dispatch(e) {
+      const listeners = this.#listeners.get(e.type) || [];
+      for (const listener of Array.from(listeners)) {
+        try {
+          listener(e);
+        } catch (r) {
+          console.error(r);
+        }
+      }
+    }
+
+    addEventListener(t, c) {
+      if (!this.#listeners.has(t)) {
+        this.#listeners.set(t, new Set());
+      }
+      this.#listeners.get(t).add(c);
+    }
+
+    removeEventListener(t, c) {
+      this.#listeners.get(t)?.delete(c);
+    }
+  }
+
+  class AdsLoader extends EventHandler {
+    #settings = new ImaSdkSettings();
+    contentComplete() {}
+    destroy() {}
+    getSettings() {
+      return this.#settings;
+    }
+    getVersion() {
+      return VERSION;
+    }
+    requestAds(r, c) {
+      // If autoplay is disabled and the page is trying to autoplay a tracking
+      // ad, then IMA fails with an error, and the page is expected to request
+      // ads again later when the user clicks to play.
+      CheckCanAutoplay().then(
+        () => {
+          const { ADS_MANAGER_LOADED } = AdsManagerLoadedEvent.Type;
+          this._dispatch(new ima.AdsManagerLoadedEvent(ADS_MANAGER_LOADED));
+        },
+        () => {
+          const e = new ima.AdError(
+            "adPlayError",
+            1205,
+            1205,
+            "The browser prevented playback initiated without user interaction."
+          );
+          this._dispatch(new ima.AdErrorEvent(e));
+        }
+      );
+    }
+  }
+
+  class AdsManager extends EventHandler {
+    #volume = 1;
+    collapse() {}
+    configureAdsManager() {}
+    destroy() {}
+    discardAdBreak() {}
+    expand() {}
+    focus() {}
+    getAdSkippableState() {
+      return false;
+    }
+    getCuePoints() {
+      return [0];
+    }
+    getCurrentAd() {
+      return currentAd;
+    }
+    getCurrentAdCuePoints() {
+      return [];
+    }
+    getRemainingTime() {
+      return 0;
+    }
+    getVolume() {
+      return this.#volume;
+    }
+    init(w, h, m, e) {}
+    isCustomClickTrackingUsed() {
+      return false;
+    }
+    isCustomPlaybackUsed() {
+      return false;
+    }
+    pause() {}
+    requestNextAdBreak() {}
+    resize(w, h, m) {}
+    resume() {}
+    setVolume(v) {
+      this.#volume = v;
+    }
+    skip() {}
+    start() {
+      requestAnimationFrame(() => {
+        for (const type of [
+          AdEvent.Type.LOADED,
+          AdEvent.Type.STARTED,
+          AdEvent.Type.CONTENT_RESUME_REQUESTED,
+          AdEvent.Type.AD_BUFFERING,
+          AdEvent.Type.FIRST_QUARTILE,
+          AdEvent.Type.MIDPOINT,
+          AdEvent.Type.THIRD_QUARTILE,
+          AdEvent.Type.COMPLETE,
+          AdEvent.Type.ALL_ADS_COMPLETED,
+        ]) {
+          try {
+            this._dispatch(new ima.AdEvent(type));
+          } catch (e) {
+            console.error(e);
+          }
+        }
+      });
+    }
+    stop() {}
+    updateAdsRenderingSettings(s) {}
+  }
+
+  class AdsRenderingSettings {}
+
+  class AdsRequest {
+    setAdWillAutoPlay() {}
+    setAdWillPlayMuted() {}
+    setContinuousPlayback() {}
+  }
+
+  class AdPodInfo {
+    getAdPosition() {
+      return 1;
+    }
+    getIsBumper() {
+      return false;
+    }
+    getMaxDuration() {
+      return -1;
+    }
+    getPodIndex() {
+      return 1;
+    }
+    getTimeOffset() {
+      return 0;
+    }
+    getTotalAds() {
+      return 1;
+    }
+  }
+
+  class Ad {
+    _pi = new AdPodInfo();
+    getAdId() {
+      return "";
+    }
+    getAdPodInfo() {
+      return this._pi;
+    }
+    getAdSystem() {
+      return "";
+    }
+    getAdvertiserName() {
+      return "";
+    }
+    getApiFramework() {
+      return null;
+    }
+    getCompanionAds() {
+      return [];
+    }
+    getContentType() {
+      return "";
+    }
+    getCreativeAdId() {
+      return "";
+    }
+    getCreativeId() {
+      return "";
+    }
+    getDealId() {
+      return "";
+    }
+    getDescription() {
+      return "";
+    }
+    getDuration() {
+      return 8.5;
+    }
+    getHeight() {
+      return 0;
+    }
+    getMediaUrl() {
+      return null;
+    }
+    getMinSuggestedDuration() {
+      return -2;
+    }
+    getSkipTimeOffset() {
+      return -1;
+    }
+    getSurveyUrl() {
+      return null;
+    }
+    getTitle() {
+      return "";
+    }
+    getTraffickingParameters() {
+      return {};
+    }
+    getTraffickingParametersString() {
+      return "";
+    }
+    getUiElements() {
+      return [""];
+    }
+    getUniversalAdIdRegistry() {
+      return "unknown";
+    }
+    getUniversalAdIds() {
+      return [""];
+    }
+    getUniversalAdIdValue() {
+      return "unknown";
+    }
+    getVastMediaBitrate() {
+      return 0;
+    }
+    getVastMediaHeight() {
+      return 0;
+    }
+    getVastMediaWidth() {
+      return 0;
+    }
+    getWidth() {
+      return 0;
+    }
+    getWrapperAdIds() {
+      return [""];
+    }
+    getWrapperAdSystems() {
+      return [""];
+    }
+    getWrapperCreativeIds() {
+      return [""];
+    }
+    isLinear() {
+      return true;
+    }
+    isSkippable() {
+      return true;
+    }
+  }
+
+  class CompanionAd {
+    getAdSlotId() {
+      return "";
+    }
+    getContent() {
+      return "";
+    }
+    getContentType() {
+      return "";
+    }
+    getHeight() {
+      return 1;
+    }
+    getWidth() {
+      return 1;
+    }
+  }
+
+  class AdError {
+    #errorCode = -1;
+    #message = "";
+    #type = "";
+    #vastErrorCode = -1;
+    constructor(type, code, vast, message) {
+      this.#errorCode = code;
+      this.#message = message;
+      this.#type = type;
+      this.#vastErrorCode = vast;
+    }
+    getErrorCode() {
+      return this.#errorCode;
+    }
+    getInnerError() {}
+    getMessage() {
+      return this.#message;
+    }
+    getType() {
+      return this.#type;
+    }
+    getVastErrorCode() {
+      return this.#vastErrorCode;
+    }
+    toString() {
+      return `AdError ${this.#errorCode}: ${this.#message}`;
+    }
+  }
+  AdError.ErrorCode = {};
+  AdError.Type = {};
+
+  const isEngadget = () => {
+    try {
+      for (const ctx of Object.values(window.vidible._getContexts())) {
+        if (ctx.getPlayer()?.div?.innerHTML.includes("www.engadget.com")) {
+          return true;
+        }
+      }
+    } catch (_) {}
+    return false;
+  };
+
+  const currentAd = isEngadget() ? undefined : new Ad();
+
+  class AdEvent {
+    constructor(type) {
+      this.type = type;
+    }
+    getAd() {
+      return currentAd;
+    }
+    getAdData() {
+      return {};
+    }
+  }
+  AdEvent.Type = {
+    AD_BREAK_READY: "adBreakReady",
+    AD_BUFFERING: "adBuffering",
+    AD_CAN_PLAY: "adCanPlay",
+    AD_METADATA: "adMetadata",
+    AD_PROGRESS: "adProgress",
+    ALL_ADS_COMPLETED: "allAdsCompleted",
+    CLICK: "click",
+    COMPLETE: "complete",
+    CONTENT_PAUSE_REQUESTED: "contentPauseRequested",
+    CONTENT_RESUME_REQUESTED: "contentResumeRequested",
+    DURATION_CHANGE: "durationChange",
+    EXPANDED_CHANGED: "expandedChanged",
+    FIRST_QUARTILE: "firstQuartile",
+    IMPRESSION: "impression",
+    INTERACTION: "interaction",
+    LINEAR_CHANGE: "linearChange",
+    LINEAR_CHANGED: "linearChanged",
+    LOADED: "loaded",
+    LOG: "log",
+    MIDPOINT: "midpoint",
+    PAUSED: "pause",
+    RESUMED: "resume",
+    SKIPPABLE_STATE_CHANGED: "skippableStateChanged",
+    SKIPPED: "skip",
+    STARTED: "start",
+    THIRD_QUARTILE: "thirdQuartile",
+    USER_CLOSE: "userClose",
+    VIDEO_CLICKED: "videoClicked",
+    VIDEO_ICON_CLICKED: "videoIconClicked",
+    VIEWABLE_IMPRESSION: "viewable_impression",
+    VOLUME_CHANGED: "volumeChange",
+    VOLUME_MUTED: "mute",
+  };
+
+  class AdErrorEvent {
+    type = "adError";
+    #error = "";
+    constructor(error) {
+      this.#error = error;
+    }
+    getError() {
+      return this.#error;
+    }
+    getUserRequestContext() {
+      return {};
+    }
+  }
+  AdErrorEvent.Type = {
+    AD_ERROR: "adError",
+  };
+
+  const manager = new AdsManager();
+
+  class AdsManagerLoadedEvent {
+    constructor(type) {
+      this.type = type;
+    }
+    getAdsManager() {
+      return manager;
+    }
+    getUserRequestContext() {
+      return {};
+    }
+  }
+  AdsManagerLoadedEvent.Type = {
+    ADS_MANAGER_LOADED: "adsManagerLoaded",
+  };
+
+  class CustomContentLoadedEvent {}
+  CustomContentLoadedEvent.Type = {
+    CUSTOM_CONTENT_LOADED: "deprecated-event",
+  };
+
+  class CompanionAdSelectionSettings {}
+  CompanionAdSelectionSettings.CreativeType = {
+    ALL: "All",
+    FLASH: "Flash",
+    IMAGE: "Image",
+  };
+  CompanionAdSelectionSettings.ResourceType = {
+    ALL: "All",
+    HTML: "Html",
+    IFRAME: "IFrame",
+    STATIC: "Static",
+  };
+  CompanionAdSelectionSettings.SizeCriteria = {
+    IGNORE: "IgnoreSize",
+    SELECT_EXACT_MATCH: "SelectExactMatch",
+    SELECT_NEAR_MATCH: "SelectNearMatch",
+  };
+
+  class AdCuePoints {
+    getCuePoints() {
+      return [];
+    }
+  }
+
+  class AdProgressData {}
+
+  class UniversalAdIdInfo {
+    getAdIdRegistry() {
+      return "";
+    }
+    getAdIsValue() {
+      return "";
+    }
+  }
+
+  Object.assign(ima, {
+    AdCuePoints,
+    AdDisplayContainer,
+    AdError,
+    AdErrorEvent,
+    AdEvent,
+    AdPodInfo,
+    AdProgressData,
+    AdsLoader,
+    AdsManager: manager,
+    AdsManagerLoadedEvent,
+    AdsRenderingSettings,
+    AdsRequest,
+    CompanionAd,
+    CompanionAdSelectionSettings,
+    CustomContentLoadedEvent,
+    gptProxyInstance: {},
+    ImaSdkSettings,
+    OmidAccessMode: {
+      DOMAIN: "domain",
+      FULL: "full",
+      LIMITED: "limited",
+    },
+    settings: new ImaSdkSettings(),
+    UiElements: {
+      AD_ATTRIBUTION: "adAttribution",
+      COUNTDOWN: "countdown",
+    },
+    UniversalAdIdInfo,
+    VERSION,
+    ViewMode: {
+      FULLSCREEN: "fullscreen",
+      NORMAL: "normal",
+    },
+  });
+
+  if (!window.google) {
+    window.google = {};
+  }
+
+  window.google.ima = ima;
+}
diff --git a/browser/extensions/webcompat/shims/google-page-ad.js b/browser/extensions/webcompat/shims/google-page-ad.js
new file mode 100644
index 0000000000..42f3a0fca5
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-page-ad.js
@@ -0,0 +1,17 @@
+/* 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 1713692 - Shim Google Page Ad conversion tracker
+ *
+ * This shim stubs out the simple API for converstion tracking with
+ * Google Page Ad, mitigating major breakage on pages which presume
+ * the API will always successfully load.
+ */
+
+if (!window.google_trackConversion) {
+  window.google_trackConversion = () => {};
+}
diff --git a/browser/extensions/webcompat/shims/google-publisher-tags.js b/browser/extensions/webcompat/shims/google-publisher-tags.js
new file mode 100644
index 0000000000..e5174d3244
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-publisher-tags.js
@@ -0,0 +1,509 @@
+/* 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 1713685 - Shim Google Publisher Tags
+ *
+ * Many sites rely on googletag to place content or drive ad bidding,
+ * and will experience major breakage if it is blocked. This shim provides
+ * enough of the API's frame To mitigate much of that breakage.
+ */
+
+if (window.googletag?.apiReady === undefined) {
+  const version = "2021050601";
+
+  const noopthisfn = function () {
+    return this;
+  };
+
+  const slots = new Map();
+  const slotsById = new Map();
+  const slotsPerPath = new Map();
+  const slotCreatives = new Map();
+  const usedCreatives = new Map();
+  const fetchedSlots = new Set();
+  const eventCallbacks = new Map();
+
+  const fireSlotEvent = (name, slot) => {
+    return new Promise(resolve => {
+      requestAnimationFrame(() => {
+        const size = [0, 0];
+        for (const cb of eventCallbacks.get(name) || []) {
+          cb({ isEmpty: true, size, slot });
+        }
+        resolve();
+      });
+    });
+  };
+
+  const recreateIframeForSlot = slot => {
+    const eid = `google_ads_iframe_${slot.getId()}`;
+    document.getElementById(eid)?.remove();
+    const node = document.getElementById(slot.getSlotElementId());
+    if (node) {
+      const f = document.createElement("iframe");
+      f.id = eid;
+      f.srcdoc = "<body></body>";
+      f.style =
+        "position:absolute; width:0; height:0; left:0; right:0; z-index:-1; border:0";
+      f.setAttribute("width", 0);
+      f.setAttribute("height", 0);
+      node.appendChild(f);
+    }
+  };
+
+  const emptySlotElement = slot => {
+    const node = document.getElementById(slot.getSlotElementId());
+    while (node?.lastChild) {
+      node.lastChild.remove();
+    }
+  };
+
+  const SizeMapping = class extends Array {
+    getCreatives() {
+      const { clientWidth, clientHeight } = document.documentElement;
+      for (const [size, creatives] of this) {
+        if (clientWidth >= size[0] && clientHeight >= size[1]) {
+          return creatives;
+        }
+      }
+      return [];
+    }
+  };
+
+  const fetchSlot = slot => {
+    if (!slot) {
+      return;
+    }
+
+    const id = slot.getSlotElementId();
+
+    const node = document.getElementById(id);
+    if (!node) {
+      return;
+    }
+
+    let creatives = slotCreatives.get(id);
+    if (creatives instanceof SizeMapping) {
+      creatives = creatives.getCreatives();
+    }
+
+    if (!creatives?.length) {
+      return;
+    }
+
+    for (const creative of creatives) {
+      if (usedCreatives.has(creative)) {
+        return;
+      }
+    }
+
+    const creative = creatives[0];
+    usedCreatives.set(creative, slot);
+    fetchedSlots.add(id);
+  };
+
+  const displaySlot = async slot => {
+    if (!slot) {
+      return;
+    }
+
+    const id = slot.getSlotElementId();
+    if (!document.getElementById(id)) {
+      return;
+    }
+
+    if (!fetchedSlots.has(id)) {
+      fetchSlot(slot);
+    }
+
+    const parent = document.getElementById(id);
+    if (parent) {
+      parent.appendChild(document.createElement("div"));
+    }
+
+    emptySlotElement(slot);
+    recreateIframeForSlot(slot);
+    await fireSlotEvent("slotRenderEnded", slot);
+    await fireSlotEvent("slotRequested", slot);
+    await fireSlotEvent("slotResponseReceived", slot);
+    await fireSlotEvent("slotOnload", slot);
+    await fireSlotEvent("impressionViewable", slot);
+  };
+
+  const addEventListener = function (name, listener) {
+    if (!eventCallbacks.has(name)) {
+      eventCallbacks.set(name, new Set());
+    }
+    eventCallbacks.get(name).add(listener);
+    return this;
+  };
+
+  const removeEventListener = function (name, listener) {
+    if (eventCallbacks.has(name)) {
+      return eventCallbacks.get(name).delete(listener);
+    }
+    return false;
+  };
+
+  const companionAdsService = {
+    addEventListener,
+    enable() {},
+    fillSlot() {},
+    getAttributeKeys: () => [],
+    getDisplayAdsCorrelator: () => "",
+    getName: () => "companion_ads",
+    getSlotIdMap: () => {
+      return {};
+    },
+    getSlots: () => [],
+    getVideoStreamCorrelator() {},
+    isRoadblockingSupported: () => false,
+    isSlotAPersistentRoadblock: () => false,
+    notifyUnfilledSlots() {},
+    onImplementationLoaded() {},
+    refreshAllSlots() {
+      for (const slot of slotsById.values()) {
+        fetchSlot(slot);
+        displaySlot(slot);
+      }
+    },
+    removeEventListener,
+    set() {},
+    setRefreshUnfilledSlots() {},
+    setVideoSession() {},
+    slotRenderEnded() {},
+  };
+
+  const contentService = {
+    addEventListener,
+    setContent() {},
+    removeEventListener,
+  };
+
+  const getTargetingValue = v => {
+    if (typeof v === "string") {
+      return [v];
+    }
+    try {
+      return [Array.prototype.flat.call(v)[0]];
+    } catch (_) {}
+    return [];
+  };
+
+  const updateTargeting = (targeting, map) => {
+    if (typeof map === "object") {
+      const entries = Object.entries(map || {});
+      for (const [k, v] of entries) {
+        targeting.set(k, getTargetingValue(v));
+      }
+    }
+  };
+
+  const defineSlot = (adUnitPath, creatives, opt_div) => {
+    if (slotsById.has(opt_div)) {
+      document.getElementById(opt_div)?.remove();
+      return slotsById.get(opt_div);
+    }
+    const attributes = new Map();
+    const targeting = new Map();
+    const exclusions = new Set();
+    const response = {
+      advertiserId: undefined,
+      campaignId: undefined,
+      creativeId: undefined,
+      creativeTemplateId: undefined,
+      lineItemId: undefined,
+    };
+    const sizes = [
+      {
+        getHeight: () => 2,
+        getWidth: () => 2,
+      },
+    ];
+    const num = (slotsPerPath.get(adUnitPath) || 0) + 1;
+    slotsPerPath.set(adUnitPath, num);
+    const id = `${adUnitPath}_${num}`;
+    let clickUrl = "";
+    let collapseEmptyDiv = null;
+    let services = new Set();
+    const slot = {
+      addService(e) {
+        services.add(e);
+        return slot;
+      },
+      clearCategoryExclusions: noopthisfn,
+      clearTargeting(k) {
+        if (k === undefined) {
+          targeting.clear();
+        } else {
+          targeting.delete(k);
+        }
+      },
+      defineSizeMapping(mapping) {
+        slotCreatives.set(opt_div, mapping);
+        return this;
+      },
+      get: k => attributes.get(k),
+      getAdUnitPath: () => adUnitPath,
+      getAttributeKeys: () => Array.from(attributes.keys()),
+      getCategoryExclusions: () => Array.from(exclusions),
+      getClickUrl: () => clickUrl,
+      getCollapseEmptyDiv: () => collapseEmptyDiv,
+      getContentUrl: () => "",
+      getDivStartsCollapsed: () => null,
+      getDomId: () => opt_div,
+      getEscapedQemQueryId: () => "",
+      getFirstLook: () => 0,
+      getId: () => id,
+      getHtml: () => "",
+      getName: () => id,
+      getOutOfPage: () => false,
+      getResponseInformation: () => response,
+      getServices: () => Array.from(services),
+      getSizes: () => sizes,
+      getSlotElementId: () => opt_div,
+      getSlotId: () => slot,
+      getTargeting: k => targeting.get(k) || gTargeting.get(k) || [],
+      getTargetingKeys: () =>
+        Array.from(
+          new Set(Array.of(...gTargeting.keys(), ...targeting.keys()))
+        ),
+      getTargetingMap: () =>
+        Object.assign(
+          Object.fromEntries(gTargeting.entries()),
+          Object.fromEntries(targeting.entries())
+        ),
+      set(k, v) {
+        attributes.set(k, v);
+        return slot;
+      },
+      setCategoryExclusion(e) {
+        exclusions.add(e);
+        return slot;
+      },
+      setClickUrl(u) {
+        clickUrl = u;
+        return slot;
+      },
+      setCollapseEmptyDiv(v) {
+        collapseEmptyDiv = !!v;
+        return slot;
+      },
+      setSafeFrameConfig: noopthisfn,
+      setTagForChildDirectedTreatment: noopthisfn,
+      setTargeting(k, v) {
+        targeting.set(k, getTargetingValue(v));
+        return slot;
+      },
+      toString: () => id,
+      updateTargetingFromMap(map) {
+        updateTargeting(targeting, map);
+        return slot;
+      },
+    };
+    slots.set(adUnitPath, slot);
+    slotsById.set(opt_div, slot);
+    slotCreatives.set(opt_div, creatives);
+    return slot;
+  };
+
+  let initialLoadDisabled = false;
+
+  const gTargeting = new Map();
+  const gAttributes = new Map();
+
+  let imaContent = { vid: "", cmsid: "" };
+  let videoContent = { vid: "", cmsid: "" };
+
+  const pubadsService = {
+    addEventListener,
+    clear() {},
+    clearCategoryExclusions: noopthisfn,
+    clearTagForChildDirectedTreatment: noopthisfn,
+    clearTargeting(k) {
+      if (k === undefined) {
+        gTargeting.clear();
+      } else {
+        gTargeting.delete(k);
+      }
+    },
+    collapseEmptyDivs() {},
+    defineOutOfPagePassback: (a, o) => defineSlot(a, 0, o),
+    definePassback: (a, s, o) => defineSlot(a, s, o),
+    disableInitialLoad() {
+      initialLoadDisabled = true;
+      return this;
+    },
+    display(adUnitPath, sizes, opt_div) {
+      const slot = defineSlot(adUnitPath, sizes, opt_div);
+      displaySlot(slot);
+    },
+    enable() {},
+    enableAsyncRendering() {},
+    enableLazyLoad() {},
+    enableSingleRequest() {},
+    enableSyncRendering() {},
+    enableVideoAds() {},
+    forceExperiment() {},
+    get: k => gAttributes.get(k),
+    getAttributeKeys: () => Array.from(gAttributes.keys()),
+    getCorrelator() {},
+    getImaContent: () => imaContent,
+    getName: () => "publisher_ads",
+    getSlots: () => Array.from(slots.values()),
+    getSlotIdMap() {
+      const map = {};
+      slots.values().forEach(s => {
+        map[s.getId()] = s;
+      });
+      return map;
+    },
+    getTagSessionCorrelator() {},
+    getTargeting: k => gTargeting.get(k) || [],
+    getTargetingKeys: () => Array.from(gTargeting.keys()),
+    getTargetingMap: () => Object.fromEntries(gTargeting.entries()),
+    getVersion: () => version,
+    getVideoContent: () => videoContent,
+    isInitialLoadDisabled: () => initialLoadDisabled,
+    isSRA: () => false,
+    markAsAmp() {},
+    refresh(slts) {
+      if (!slts) {
+        slts = slots.values();
+      } else if (!Array.isArray(slts)) {
+        slts = [slts];
+      }
+      for (const slot of slts) {
+        if (slot) {
+          try {
+            fetchSlot(slot);
+            displaySlot(slot);
+          } catch (e) {
+            console.error(e);
+          }
+        }
+      }
+    },
+    removeEventListener,
+    set(k, v) {
+      gAttributes[k] = v;
+      return this;
+    },
+    setCategoryExclusion: noopthisfn,
+    setCentering() {},
+    setCookieOptions: noopthisfn,
+    setCorrelator: noopthisfn,
+    setForceSafeFrame: noopthisfn,
+    setImaContent(vid, cmsid) {
+      imaContent = { vid, cmsid };
+      return this;
+    },
+    setLocation: noopthisfn,
+    setPrivacySettings: noopthisfn,
+    setPublisherProvidedId: noopthisfn,
+    setRequestNonPersonalizedAds: noopthisfn,
+    setSafeFrameConfig: noopthisfn,
+    setTagForChildDirectedTreatment: noopthisfn,
+    setTagForUnderAgeOfConsent: noopthisfn,
+    setTargeting(k, v) {
+      gTargeting.set(k, getTargetingValue(v));
+      return this;
+    },
+    setVideoContent(vid, cmsid) {
+      videoContent = { vid, cmsid };
+      return this;
+    },
+    updateCorrelator() {},
+    updateTargetingFromMap(map) {
+      updateTargeting(gTargeting, map);
+      return this;
+    },
+  };
+
+  const SizeMappingBuilder = class {
+    #mapping;
+    constructor() {
+      this.#mapping = new SizeMapping();
+    }
+    addSize(size, creatives) {
+      if (
+        size !== "fluid" &&
+        (!Array.isArray(size) || isNaN(size[0]) || isNaN(size[1]))
+      ) {
+        this.#mapping = null;
+      } else {
+        this.#mapping?.push([size, creatives]);
+      }
+      return this;
+    }
+    build() {
+      return this.#mapping;
+    }
+  };
+
+  let gt = window.googletag;
+  if (!gt) {
+    gt = window.googletag = {};
+  }
+
+  Object.assign(gt, {
+    apiReady: true,
+    companionAds: () => companionAdsService,
+    content: () => contentService,
+    defineOutOfPageSlot: (a, o) => defineSlot(a, 0, o),
+    defineSlot: (a, s, o) => defineSlot(a, s, o),
+    destroySlots() {
+      slots.clear();
+      slotsById.clear();
+    },
+    disablePublisherConsole() {},
+    display(arg) {
+      let id;
+      if (arg?.getSlotElementId) {
+        id = arg.getSlotElementId();
+      } else if (arg?.nodeType) {
+        id = arg.id;
+      } else {
+        id = String(arg);
+      }
+      displaySlot(slotsById.get(id));
+    },
+    enableServices() {},
+    enums: {
+      OutOfPageFormat: {
+        BOTTOM_ANCHOR: 3,
+        INTERSTITIAL: 5,
+        REWARDED: 4,
+        TOP_ANCHOR: 2,
+      },
+    },
+    getVersion: () => version,
+    pubads: () => pubadsService,
+    pubadsReady: true,
+    setAdIframeTitle() {},
+    sizeMapping: () => new SizeMappingBuilder(),
+  });
+
+  const run = function (fn) {
+    if (typeof fn === "function") {
+      try {
+        fn.call(window);
+      } catch (e) {
+        console.error(e);
+      }
+    }
+  };
+
+  const cmds = gt.cmd || [];
+  const newCmd = [];
+  newCmd.push = run;
+  gt.cmd = newCmd;
+
+  for (const cmd of cmds) {
+    run(cmd);
+  }
+}
diff --git a/browser/extensions/webcompat/shims/google-safeframe.html b/browser/extensions/webcompat/shims/google-safeframe.html
new file mode 100644
index 0000000000..34bc1d242f
--- /dev/null
+++ b/browser/extensions/webcompat/shims/google-safeframe.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!-- 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/.
+
+  Bug 1713691 - Shim Google SafeFrame
+
+  Some sites will break if they cannot load a Google SafeFrame. This
+  shim provides a stand-in for the frame to mitigate that breakage.
+-->
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <title>SafeFrame Container</title>
+    <script>
+      try {
+        const F = /^([^;]+);(\d+);([\s\S]*)$/.exec(window.name);
+        window.name = "";
+        const P = window.document;
+        P.open("text/html", "replace");
+        P.write(F[3].substr(0, +F[2]));
+        P.close();
+      } catch (e) {
+        console.error(e);
+      }
+    </script>
+  </head>
+  <body></body>
+</html>
diff --git a/browser/extensions/webcompat/shims/history.js b/browser/extensions/webcompat/shims/history.js
new file mode 100644
index 0000000000..6fbd1fdedb
--- /dev/null
+++ b/browser/extensions/webcompat/shims/history.js
@@ -0,0 +1,54 @@
+/* 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 1624853 - Shim Storage Access API on history.com
+ *
+ * history.com uses Adobe as a necessary third party to authenticating
+ * with a TV provider. In order to accomodate this, we grant storage access
+ * to the Adobe domain via the Storage Access API when the login or logout
+ * buttons are clicked, then forward the click to continue as normal.
+ */
+
+console.warn(
+  `When using oauth, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1624853 for details.`
+);
+
+// Third-party origin we need to request storage access for.
+const STORAGE_ACCESS_ORIGIN = "https://sp.auth.adobe.com";
+
+document.documentElement.addEventListener(
+  "click",
+  e => {
+    const { target, isTrusted } = e;
+    if (!isTrusted) {
+      return;
+    }
+
+    const button = target.closest("a");
+    if (!button) {
+      return;
+    }
+
+    const buttonLink = button.href;
+    if (buttonLink?.startsWith("https://www.history.com/mvpd-auth")) {
+      button.disabled = true;
+      button.style.opacity = 0.5;
+      e.stopPropagation();
+      e.preventDefault();
+      document
+        .requestStorageAccessForOrigin(STORAGE_ACCESS_ORIGIN)
+        .then(() => {
+          target.click();
+        })
+        .catch(() => {
+          button.disabled = false;
+          button.style.opacity = 1.0;
+        });
+    }
+  },
+  true
+);
diff --git a/browser/extensions/webcompat/shims/iam.js b/browser/extensions/webcompat/shims/iam.js
new file mode 100644
index 0000000000..84dee0e484
--- /dev/null
+++ b/browser/extensions/webcompat/shims/iam.js
@@ -0,0 +1,39 @@
+/* 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 1761774 - Shim INFOnline IAM tracker
+ *
+ * Sites using IAM can break if it is blocked. This shim mitigates that
+ * breakage by loading a stand-in module.
+ */
+
+if (!window.iom?.c) {
+  window.iom = {
+    c: () => {},
+    consent: () => {},
+    count: () => {},
+    ct: () => {},
+    deloptout: () => {},
+    doo: () => {},
+    e: () => {},
+    event: () => {},
+    getInvitation: () => {},
+    getPlus: () => {},
+    gi: () => {},
+    gp: () => {},
+    h: () => {},
+    hybrid: () => {},
+    i: () => {},
+    init: () => {},
+    oi: () => {},
+    optin: () => {},
+    setMultiIdentifier: () => {},
+    setoptout: () => {},
+    smi: () => {},
+    soo: () => {},
+  };
+}
diff --git a/browser/extensions/webcompat/shims/iaspet.js b/browser/extensions/webcompat/shims/iaspet.js
new file mode 100644
index 0000000000..7e19dd52ad
--- /dev/null
+++ b/browser/extensions/webcompat/shims/iaspet.js
@@ -0,0 +1,45 @@
+/* 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 1713701 - Shim Integral Ad Science iaspet.js
+ *
+ * Some sites use iaspet to place content, often together with Google Publisher
+ * Tags. This shim prevents breakage when the script is blocked.
+ */
+
+if (!window.__iasPET?.VERSION) {
+  let queue = window?.__iasPET?.queue;
+  if (!Array.isArray(queue)) {
+    queue = [];
+  }
+
+  const response = JSON.stringify({
+    brandSafety: {},
+    slots: {},
+  });
+
+  function run(cmd) {
+    try {
+      cmd?.dataHandler?.(response);
+    } catch (_) {}
+  }
+
+  queue.push = run;
+
+  window.__iasPET = {
+    VERSION: "1.16.18",
+    queue,
+    sessionId: "",
+    setTargetingForAppNexus() {},
+    setTargetingForGPT() {},
+    start() {},
+  };
+
+  while (queue.length) {
+    run(queue.shift());
+  }
+}
diff --git a/browser/extensions/webcompat/shims/instagram.js b/browser/extensions/webcompat/shims/instagram.js
new file mode 100644
index 0000000000..5bf5014fdc
--- /dev/null
+++ b/browser/extensions/webcompat/shims/instagram.js
@@ -0,0 +1,55 @@
+/* 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 1804445 - instagram login broken with dFPI enabled
+ *
+ * Instagram login with Facebook account requires Facebook to have the storage
+ * access under Instagram. This shim adds a request for storage access for
+ * Facebook when the user tries to log in with a Facebook account.
+ */
+
+console.warn(
+  `When logging in, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1804445 for details.`
+);
+
+// Third-party origin we need to request storage access for.
+const STORAGE_ACCESS_ORIGIN = "https://www.facebook.com";
+
+document.documentElement.addEventListener(
+  "click",
+  e => {
+    const { target, isTrusted } = e;
+    if (!isTrusted) {
+      return;
+    }
+    const button = target.closest("button[type=button]");
+    if (!button) {
+      return;
+    }
+    const form = target.closest("#loginForm");
+    if (!form) {
+      return;
+    }
+
+    console.warn(
+      "Calling the Storage Access API on behalf of " + STORAGE_ACCESS_ORIGIN
+    );
+    button.disabled = true;
+    e.stopPropagation();
+    e.preventDefault();
+    document
+      .requestStorageAccessForOrigin(STORAGE_ACCESS_ORIGIN)
+      .then(() => {
+        button.disabled = false;
+        target.click();
+      })
+      .catch(() => {
+        button.disabled = false;
+      });
+  },
+  true
+);
diff --git a/browser/extensions/webcompat/shims/kinja.js b/browser/extensions/webcompat/shims/kinja.js
new file mode 100644
index 0000000000..d30425b42d
--- /dev/null
+++ b/browser/extensions/webcompat/shims/kinja.js
@@ -0,0 +1,44 @@
+/* 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/. */
+
+/* globals exportFunction */
+
+"use strict";
+
+/**
+ * Kinja powered blogs rely on storage access to https://kinja.com to enable
+ * oauth with external providers. For dFPI, sites need to use the Storage Access
+ * API to gain first party storage access. This shim calls requestStorageAccess
+ * on behalf of the site when a user wants to log in via oauth.
+ */
+
+// Third-party origin we need to request storage access for.
+const STORAGE_ACCESS_ORIGIN = "https://kinja.com";
+
+// Prefix of the path opened in a new window when users click the oauth login
+// buttons.
+const OAUTH_PATH_PREFIX = "/oauthlogin?provider=";
+
+console.warn(
+  `When using oauth, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1656171 for details.`
+);
+
+// Overwrite the window.open method so we can detect oauth related popups.
+const origOpen = window.wrappedJSObject.open;
+Object.defineProperty(window.wrappedJSObject, "open", {
+  value: exportFunction((url, ...args) => {
+    // Filter oauth popups.
+    if (!url.startsWith(OAUTH_PATH_PREFIX)) {
+      return origOpen(url, ...args);
+    }
+    // Request storage access for Kinja.
+    document.requestStorageAccessForOrigin(STORAGE_ACCESS_ORIGIN).then(() => {
+      origOpen(url, ...args);
+    });
+    // We don't have the window object yet which window.open returns, since the
+    // sign-in flow is dependent on the async storage access request. This isn't
+    // a problem as long as the website does not consume it.
+    return null;
+  }, window),
+});
diff --git a/browser/extensions/webcompat/shims/live-test-shim.js b/browser/extensions/webcompat/shims/live-test-shim.js
new file mode 100644
index 0000000000..45ab9ba48b
--- /dev/null
+++ b/browser/extensions/webcompat/shims/live-test-shim.js
@@ -0,0 +1,82 @@
+/* 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";
+
+/* globals browser */
+
+if (!window.LiveTestShimPromise) {
+  const originalUrl = document.currentScript.src;
+
+  const shimId = "LiveTestShim";
+
+  const sendMessageToAddon = (function () {
+    const pendingMessages = new Map();
+    const channel = new MessageChannel();
+    channel.port1.onerror = console.error;
+    channel.port1.onmessage = event => {
+      const { messageId, response } = event.data;
+      const resolve = pendingMessages.get(messageId);
+      if (resolve) {
+        pendingMessages.delete(messageId);
+        resolve(response);
+      }
+    };
+    function reconnect() {
+      const detail = {
+        pendingMessages: [...pendingMessages.values()],
+        port: channel.port2,
+        shimId,
+      };
+      window.dispatchEvent(new CustomEvent("ShimConnects", { detail }));
+    }
+    window.addEventListener("ShimHelperReady", reconnect);
+    reconnect();
+    return function (message) {
+      const messageId =
+        Math.random().toString(36).substring(2) + Date.now().toString(36);
+      return new Promise(resolve => {
+        const payload = {
+          message,
+          messageId,
+          shimId,
+        };
+        pendingMessages.set(messageId, resolve);
+        channel.port1.postMessage(payload);
+      });
+    };
+  })();
+
+  async function go(options) {
+    try {
+      const o = document.getElementById("shims");
+      const cl = o.classList;
+      cl.remove("red");
+      cl.add("green");
+      o.innerText = JSON.stringify(options || "");
+    } catch (_) {}
+
+    if (window !== top) {
+      return;
+    }
+
+    await sendMessageToAddon("optIn");
+
+    const s = document.createElement("script");
+    s.src = originalUrl;
+    document.head.appendChild(s);
+  }
+
+  window[`${shimId}Promise`] = sendMessageToAddon("getOptions").then(
+    options => {
+      if (document.readyState !== "loading") {
+        go(options);
+      } else {
+        window.addEventListener("DOMContentLoaded", () => {
+          go(options);
+        });
+      }
+    }
+  );
+}
diff --git a/browser/extensions/webcompat/shims/maxmind-geoip.js b/browser/extensions/webcompat/shims/maxmind-geoip.js
new file mode 100644
index 0000000000..e5eb1e45a3
--- /dev/null
+++ b/browser/extensions/webcompat/shims/maxmind-geoip.js
@@ -0,0 +1,69 @@
+/* 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 1754389 - Shim Maxmind GeoIP library
+ *
+ * Some sites rely on Maxmind's GeoIP library which gets blocked by ETP's
+ * fingerprinter blocking. With the library window global not being defined
+ * functionality may break or the site does not render at all. This shim
+ * has it return the United States as the location for all users.
+ */
+
+if (!window.geoip2) {
+  const continent = {
+    code: "NA",
+    geoname_id: 6255149,
+    names: {
+      de: "Nordamerika",
+      en: "North America",
+      es: "Norteamérica",
+      fr: "Amérique du Nord",
+      ja: "北アメリカ",
+      "pt-BR": "América do Norte",
+      ru: "Северная Америка",
+      "zh-CN": "北美洲",
+    },
+  };
+
+  const country = {
+    geoname_id: 6252001,
+    iso_code: "US",
+    names: {
+      de: "USA",
+      en: "United States",
+      es: "Estados Unidos",
+      fr: "États-Unis",
+      ja: "アメリカ合衆国",
+      "pt-BR": "Estados Unidos",
+      ru: "США",
+      "zh-CN": "美国",
+    },
+  };
+
+  const city = {
+    names: {
+      en: "",
+    },
+  };
+
+  const callback = onSuccess => {
+    requestAnimationFrame(() => {
+      onSuccess({
+        city,
+        continent,
+        country,
+        registered_country: country,
+      });
+    });
+  };
+
+  window.geoip2 = {
+    country: callback,
+    city: callback,
+    insights: callback,
+  };
+}
diff --git a/browser/extensions/webcompat/shims/microsoftLogin.js b/browser/extensions/webcompat/shims/microsoftLogin.js
new file mode 100644
index 0000000000..ebbfb2fbff
--- /dev/null
+++ b/browser/extensions/webcompat/shims/microsoftLogin.js
@@ -0,0 +1,29 @@
+/* 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/. */
+
+const SANDBOX_ATTR = "allow-storage-access-by-user-activation";
+
+console.warn(
+  "Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1638383 for details."
+);
+
+// Watches for MS auth iframes and adds missing sandbox attribute. The attribute
+// is required so the third-party iframe can gain access to its first party
+// storage via the Storage Access API.
+function init() {
+  const observer = new MutationObserver(() => {
+    document.body
+      .querySelectorAll("iframe[id^='msalRenewFrame'][sandbox]")
+      .forEach(frame => {
+        frame.sandbox.add(SANDBOX_ATTR);
+      });
+  });
+
+  observer.observe(document.body, {
+    attributes: true,
+    subtree: false,
+    childList: true,
+  });
+}
+window.addEventListener("DOMContentLoaded", init);
diff --git a/browser/extensions/webcompat/shims/microsoftVirtualAssistant.js b/browser/extensions/webcompat/shims/microsoftVirtualAssistant.js
new file mode 100644
index 0000000000..4b4493750c
--- /dev/null
+++ b/browser/extensions/webcompat/shims/microsoftVirtualAssistant.js
@@ -0,0 +1,46 @@
+/* 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 1801277 - Shim Microsoft virtual assistant.
+ *
+ * The microsoft virtual assistant will break when accessing the indexedDB that
+ * will throw a security error because the virtual assistant is under a
+ * third-party tracking domain 'liveperson.net'. The shim replaces the indexedDB
+ * with a fake interface that won't throw an error.
+ */
+
+/* globals cloneInto */
+
+(function () {
+  const win = window.wrappedJSObject;
+
+  try {
+    // We only replace the indexedDB when liveperson.net is loaded in a
+    // third-party context. Note that this is not strictly correct because
+    // this is a cross-origin check but not a third-party check.
+    if (win.parent == win || win.location.origin == win.top.location.origin) {
+      return;
+    }
+  } catch (e) {
+    // If we get a security error when accessing the top-level origin, this
+    // shows that the window is in a cross-origin context. In this case, we can
+    // proceed to apply the shim.
+    if (e.name != "SecurityError") {
+      throw e;
+    }
+  }
+
+  const emptyMsg = cloneInto({ message: "" }, window);
+
+  const idb = {
+    open: () => win.Promise.reject(emptyMsg),
+  };
+
+  Object.defineProperty(win, "indexedDB", {
+    value: cloneInto(idb, window, { cloneFunctions: true }),
+  });
+})();
diff --git a/browser/extensions/webcompat/shims/moat.js b/browser/extensions/webcompat/shims/moat.js
new file mode 100644
index 0000000000..9957492684
--- /dev/null
+++ b/browser/extensions/webcompat/shims/moat.js
@@ -0,0 +1,46 @@
+/* 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 1713704 - Shim Moat ad tracker
+ *
+ * Sites such as Forbes may gate content behind Moat ads, resulting in
+ * breakage like black boxes where videos should be placed. This shim
+ * helps mitigate that breakage by allowing the placement to succeed.
+ */
+
+if (!window.moatPrebidAPI?.__A) {
+  const targeting = new Map();
+
+  const slotConfig = {
+    m_categories: ["moat_safe"],
+    m_data: "0",
+    m_safety: "safe",
+  };
+
+  window.moatPrebidApi = {
+    __A() {},
+    disableLogging() {},
+    enableLogging() {},
+    getMoatTargetingForPage: () => slotConfig,
+    getMoatTargetingForSlot(slot) {
+      return targeting.get(slot?.getSlotElementId());
+    },
+    pageDataAvailable: () => true,
+    safetyDataAvailable: () => true,
+    setMoatTargetingForAllSlots() {
+      for (const slot of window.googletag.pubads().getSlots() || []) {
+        targeting.set(slot.getSlotElementId(), slot.getTargeting());
+      }
+    },
+    setMoatTargetingForSlot(slot) {
+      targeting.set(slot?.getSlotElementId(), slotConfig);
+    },
+    slotDataAvailable() {
+      return window.googletag?.pubads().getSlots().length > 0;
+    },
+  };
+}
diff --git a/browser/extensions/webcompat/shims/mochitest-shim-1.js b/browser/extensions/webcompat/shims/mochitest-shim-1.js
new file mode 100644
index 0000000000..d95059cf7a
--- /dev/null
+++ b/browser/extensions/webcompat/shims/mochitest-shim-1.js
@@ -0,0 +1,87 @@
+/* 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";
+
+/* globals browser */
+
+if (!window.MochitestShimPromise) {
+  const originalUrl = document.currentScript.src;
+
+  const shimId = "MochitestShim";
+
+  const sendMessageToAddon = (function () {
+    const pendingMessages = new Map();
+    const channel = new MessageChannel();
+    channel.port1.onerror = console.error;
+    channel.port1.onmessage = event => {
+      const { messageId, response } = event.data;
+      const resolve = pendingMessages.get(messageId);
+      if (resolve) {
+        pendingMessages.delete(messageId);
+        resolve(response);
+      }
+    };
+    function reconnect() {
+      const detail = {
+        pendingMessages: [...pendingMessages.values()],
+        port: channel.port2,
+        shimId,
+      };
+      window.dispatchEvent(new CustomEvent("ShimConnects", { detail }));
+    }
+    window.addEventListener("ShimHelperReady", reconnect);
+    reconnect();
+    return function (message) {
+      const messageId =
+        Math.random().toString(36).substring(2) + Date.now().toString(36);
+      return new Promise(resolve => {
+        const payload = {
+          message,
+          messageId,
+          shimId,
+        };
+        pendingMessages.set(messageId, resolve);
+        channel.port1.postMessage(payload);
+      });
+    };
+  })();
+
+  async function go(options) {
+    try {
+      const o = document.getElementById("shims");
+      const cl = o.classList;
+      cl.remove("red");
+      cl.add("green");
+      o.innerText = JSON.stringify(options || "");
+    } catch (_) {}
+
+    window.shimPromiseResolve("shimmed");
+
+    if (window !== top) {
+      window.optInPromiseResolve(false);
+      return;
+    }
+
+    await sendMessageToAddon("optIn");
+
+    window.doingOptIn = true;
+    const s = document.createElement("script");
+    s.src = originalUrl;
+    s.onerror = () => window.optInPromiseResolve("error");
+    document.head.appendChild(s);
+  }
+
+  window[`${shimId}Promise`] = new Promise(resolve => {
+    sendMessageToAddon("getOptions").then(options => {
+      if (document.readyState !== "loading") {
+        resolve(go(options));
+      } else {
+        window.addEventListener("DOMContentLoaded", () => {
+          resolve(go(options));
+        });
+      }
+    });
+  });
+}
diff --git a/browser/extensions/webcompat/shims/mochitest-shim-2.js b/browser/extensions/webcompat/shims/mochitest-shim-2.js
new file mode 100644
index 0000000000..bc5536405e
--- /dev/null
+++ b/browser/extensions/webcompat/shims/mochitest-shim-2.js
@@ -0,0 +1,85 @@
+/* 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";
+
+/* globals browser */
+
+if (!window.testPromise) {
+  const originalUrl = document.currentScript.src;
+
+  const shimId = "MochitestShim2";
+
+  const sendMessageToAddon = (function () {
+    const pendingMessages = new Map();
+    const channel = new MessageChannel();
+    channel.port1.onerror = console.error;
+    channel.port1.onmessage = event => {
+      const { messageId, response } = event.data;
+      const resolve = pendingMessages.get(messageId);
+      if (resolve) {
+        pendingMessages.delete(messageId);
+        resolve(response);
+      }
+    };
+    function reconnect() {
+      const detail = {
+        pendingMessages: [...pendingMessages.values()],
+        port: channel.port2,
+        shimId,
+      };
+      window.dispatchEvent(new CustomEvent("ShimConnects", { detail }));
+    }
+    window.addEventListener("ShimHelperReady", reconnect);
+    reconnect();
+    return function (message) {
+      const messageId =
+        Math.random().toString(36).substring(2) + Date.now().toString(36);
+      return new Promise(resolve => {
+        const payload = {
+          message,
+          messageId,
+          shimId,
+        };
+        pendingMessages.set(messageId, resolve);
+        channel.port1.postMessage(payload);
+      });
+    };
+  })();
+
+  async function go(options) {
+    try {
+      const o = document.getElementById("shims");
+      const cl = o.classList;
+      cl.remove("red");
+      cl.add("green");
+      o.innerText = JSON.stringify(options || "");
+    } catch (_) {}
+
+    window.shimPromiseResolve("shimmed");
+
+    if (window !== top) {
+      window.optInPromiseResolve(false);
+      return;
+    }
+
+    await sendMessageToAddon("optIn");
+
+    window.doingOptIn = true;
+    const s = document.createElement("script");
+    s.src = originalUrl;
+    s.onerror = () => window.optInPromiseResolve("error");
+    document.head.appendChild(s);
+  }
+
+  sendMessageToAddon("getOptions").then(options => {
+    if (document.readyState !== "loading") {
+      go(options);
+    } else {
+      window.addEventListener("DOMContentLoaded", () => {
+        go(options);
+      });
+    }
+  });
+}
diff --git a/browser/extensions/webcompat/shims/mochitest-shim-3.js b/browser/extensions/webcompat/shims/mochitest-shim-3.js
new file mode 100644
index 0000000000..dc0a8005f5
--- /dev/null
+++ b/browser/extensions/webcompat/shims/mochitest-shim-3.js
@@ -0,0 +1,7 @@
+/* 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";
+
+window.shimPromiseResolve("shimmed");
diff --git a/browser/extensions/webcompat/shims/nielsen.js b/browser/extensions/webcompat/shims/nielsen.js
new file mode 100644
index 0000000000..d34528a7c1
--- /dev/null
+++ b/browser/extensions/webcompat/shims/nielsen.js
@@ -0,0 +1,111 @@
+/* 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 1760754 - Shim Nielsen tracker
+ *
+ * Sites expecting the Nielsen tracker to load properly can break if it
+ * is blocked. This shim mitigates that breakage by loading a stand-in.
+ */
+
+if (!window.nol_t) {
+  const cid = "";
+
+  let domain = "";
+  let schemeHost = "";
+  let scriptName = "";
+  try {
+    const url = document?.currentScript?.src;
+    const { pathname, protocol, host } = new URL(url);
+    domain = host.split(".").slice(0, -2).join(".");
+    schemeHost = `${protocol}//${host}/`;
+    scriptName = pathname.split("/").pop();
+  } catch (_) {}
+
+  const NolTracker = class {
+    CONST = {
+      max_tags: 20,
+    };
+    feat = {};
+    globals = {
+      cid,
+      content: "0",
+      defaultApidFile: "config250",
+      defaultErrorParams: {
+        nol_vcid: "c00",
+        nol_clientid: "",
+      },
+      domain,
+      fpidSfCodeList: [""],
+      init() {},
+      tagCurrRetry: -1,
+      tagMaxRetry: 3,
+      wlCurrRetry: -1,
+      wlMaxRetry: 3,
+    };
+    pmap = [];
+    pvar = {
+      cid,
+      content: "0",
+      cookies_enabled: "n",
+      server: domain,
+    };
+    scriptName = [scriptName];
+    version = "6.0.107";
+
+    addScript() {}
+    catchLinkOverlay() {}
+    clickEvent() {}
+    clickTrack() {}
+    do_sample() {}
+    downloadEvent() {}
+    eventTrack() {}
+    filter() {}
+    fireToUrl() {}
+    getSchemeHost() {
+      return schemeHost;
+    }
+    getVersion() {}
+    iframe() {}
+    in_sample() {
+      return true;
+    }
+    injectBsdk() {}
+    invite() {}
+    linkTrack() {}
+    mergeFeatures() {}
+    pageEvent() {}
+    pause() {}
+    populateWhitelist() {}
+    post() {}
+    postClickTrack() {}
+    postData() {}
+    postEvent() {}
+    postEventTrack() {}
+    postLinkTrack() {}
+    prefix() {
+      return "";
+    }
+    processDdrsSvc() {}
+    random() {}
+    record() {
+      return this;
+    }
+    regLinkOverlay() {}
+    regListen() {}
+    retrieveCiFileViaCors() {}
+    sectionEvent() {}
+    sendALink() {}
+    sendForm() {}
+    sendIt() {}
+    slideEvent() {}
+    whitelistAssigned() {}
+  };
+
+  window.nol_t = () => {
+    return new NolTracker();
+  };
+}
diff --git a/browser/extensions/webcompat/shims/optimizely.js b/browser/extensions/webcompat/shims/optimizely.js
new file mode 100644
index 0000000000..dcda87421d
--- /dev/null
+++ b/browser/extensions/webcompat/shims/optimizely.js
@@ -0,0 +1,205 @@
+/* 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/. */
+
+/**
+ * Bug 1714431 - Shim Optimizely
+ *
+ * This shim stubs out window.optimizely for those sites which
+ * break when it is not successfully loaded.
+ */
+
+if (!window.optimizely?.state) {
+  const behavior = {
+    query: () => [],
+  };
+
+  const dcp = {
+    getAttributeValue() {},
+    waitForAttributeValue: () => Promise.resolve(),
+  };
+
+  const data = {
+    accountId: "",
+    audiences: {},
+    campaigns: {},
+    clientName: "js",
+    clientVersion: "0.166.0",
+    dcpServiceId: null,
+    events: {},
+    experiments: {},
+    groups: {},
+    pages: {},
+    projectId: "",
+    revision: "",
+    snippetId: null,
+    variations: {},
+  };
+
+  const activationId = String(Date.now());
+
+  const state = {
+    getActivationId() {
+      return activationId;
+    },
+    getActiveExperimentIds() {
+      return [];
+    },
+    getCampaignStateLists() {
+      return {};
+    },
+    getCampaignStates() {
+      return {};
+    },
+    getDecisionObject() {
+      return null;
+    },
+    getDecisionString() {
+      return null;
+    },
+    getExperimentStates() {
+      return {};
+    },
+    getPageStates() {
+      return {};
+    },
+    getRedirectInfo() {
+      return null;
+    },
+    getVariationMap() {
+      return {};
+    },
+    isGlobalHoldback() {
+      return false;
+    },
+  };
+
+  const poll = (fn, to) => {
+    setInterval(() => {
+      try {
+        fn();
+      } catch (_) {}
+    }, to);
+  };
+
+  const waitUntil = test => {
+    let interval, resolve;
+    function check() {
+      try {
+        if (test()) {
+          clearInterval(interval);
+          resolve?.();
+          return true;
+        }
+      } catch (_) {}
+      return false;
+    }
+    return new Promise(r => {
+      resolve = r;
+      if (check()) {
+        resolve();
+        return;
+      }
+      interval = setInterval(check, 250);
+    });
+  };
+
+  const waitForElement = sel => {
+    return waitUntil(() => {
+      document.querySelector(sel);
+    });
+  };
+
+  const observeSelector = (sel, fn, opts) => {
+    let interval;
+    const observed = new Set();
+    function check() {
+      try {
+        for (const e of document.querySelectorAll(sel)) {
+          if (observed.has(e)) {
+            continue;
+          }
+          observed.add(e);
+          try {
+            fn(e);
+          } catch (_) {}
+          if (opts.once) {
+            clearInterval(interval);
+          }
+        }
+      } catch (_) {}
+    }
+    interval = setInterval(check, 250);
+    const timeout = { opts };
+    if (timeout) {
+      setTimeout(() => {
+        clearInterval(interval);
+      }, timeout);
+    }
+  };
+
+  const utils = {
+    Promise: window.Promise,
+    observeSelector,
+    poll,
+    waitForElement,
+    waitUntil,
+  };
+
+  const visitorId = {
+    randomId: "",
+  };
+
+  let browserVersion = "";
+  try {
+    browserVersion = navigator.userAgent.match(/rv:(.*)\)/)[1];
+  } catch (_) {}
+
+  const visitor = {
+    browserId: "ff",
+    browserVersion,
+    currentTimestamp: Date.now(),
+    custom: {},
+    customBehavior: {},
+    device: "desktop",
+    device_type: "desktop_laptop",
+    events: [],
+    first_session: true,
+    offset: 240,
+    referrer: null,
+    source_type: "direct",
+    visitorId,
+  };
+
+  window.optimizely = {
+    data: {
+      note: "Obsolete, use optimizely.get('data') instead",
+    },
+    get(e) {
+      switch (e) {
+        case "behavior":
+          return behavior;
+        case "data":
+          return data;
+        case "dcp":
+          return dcp;
+        case "jquery":
+          throw new Error("jQuery not implemented");
+        case "session":
+          return undefined;
+        case "state":
+          return state;
+        case "utils":
+          return utils;
+        case "visitor":
+          return visitor;
+        case "visitor_id":
+          return visitorId;
+      }
+      return undefined;
+    },
+    initialized: true,
+    push() {},
+    state: {},
+  };
+}
diff --git a/browser/extensions/webcompat/shims/play.svg b/browser/extensions/webcompat/shims/play.svg
new file mode 100644
index 0000000000..df5bbcb4f1
--- /dev/null
+++ b/browser/extensions/webcompat/shims/play.svg
@@ -0,0 +1,7 @@
+<!-- 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/.
+  source: https://searchfox.org/mozilla-central/source/devtools/client/themes/images/play.svg -->
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+  <path fill="#fff" d="M20.436 11.37L5.904 2.116c-.23-.147-.523-.158-.762-.024-.24.132-.39.384-.39.657v18.5c0 .273.15.525.39.657.112.063.236.093.36.093.14 0 .28-.04.402-.117l14.53-9.248c.218-.138.35-.376.35-.633 0-.256-.132-.495-.348-.633z"/>
+</svg>
diff --git a/browser/extensions/webcompat/shims/private-browsing-web-api-fixes.js b/browser/extensions/webcompat/shims/private-browsing-web-api-fixes.js
new file mode 100644
index 0000000000..bc45aeda26
--- /dev/null
+++ b/browser/extensions/webcompat/shims/private-browsing-web-api-fixes.js
@@ -0,0 +1,17 @@
+/* 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 1714354 - Fix for site issues with web APIs in private browsing
+ *
+ * Some sites expect specific DOM APIs to work in specific ways, which
+ * is not always true, such as in private browsing mode. We work around
+ * related breakage by undefining those APIs entirely in private
+ * browsing mode for those sites.
+ */
+
+delete window.wrappedJSObject.caches;
+delete window.wrappedJSObject.indexedDB;
diff --git a/browser/extensions/webcompat/shims/rambler-authenticator.js b/browser/extensions/webcompat/shims/rambler-authenticator.js
new file mode 100644
index 0000000000..1fe074b660
--- /dev/null
+++ b/browser/extensions/webcompat/shims/rambler-authenticator.js
@@ -0,0 +1,84 @@
+/* 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";
+
+if (!window.ramblerIdHelper) {
+  const originalScript = document.currentScript.src;
+
+  const sendMessageToAddon = (function () {
+    const shimId = "Rambler";
+    const pendingMessages = new Map();
+    const channel = new MessageChannel();
+    channel.port1.onerror = console.error;
+    channel.port1.onmessage = event => {
+      const { messageId, response } = event.data;
+      const resolve = pendingMessages.get(messageId);
+      if (resolve) {
+        pendingMessages.delete(messageId);
+        resolve(response);
+      }
+    };
+    function reconnect() {
+      const detail = {
+        pendingMessages: [...pendingMessages.values()],
+        port: channel.port2,
+        shimId,
+      };
+      window.dispatchEvent(new CustomEvent("ShimConnects", { detail }));
+    }
+    window.addEventListener("ShimHelperReady", reconnect);
+    reconnect();
+    return function (message) {
+      const messageId =
+        Math.random().toString(36).substring(2) + Date.now().toString(36);
+      return new Promise(resolve => {
+        const payload = {
+          message,
+          messageId,
+          shimId,
+        };
+        pendingMessages.set(messageId, resolve);
+        channel.port1.postMessage(payload);
+      });
+    };
+  })();
+
+  const ramblerIdHelper = {
+    getProfileInfo: (successCallback, errorCallback) => {
+      successCallback({});
+    },
+    openAuth: () => {
+      sendMessageToAddon("optIn").then(function () {
+        const openAuthArgs = arguments;
+        window.ramblerIdHelper = undefined;
+        const s = document.createElement("script");
+        s.src = originalScript;
+        document.head.appendChild(s);
+        s.addEventListener("load", () => {
+          const helper = window.ramblerIdHelper;
+          for (const { fn, args } of callLog) {
+            helper[fn].apply(helper, args);
+          }
+          helper.openAuth.apply(helper, openAuthArgs);
+        });
+      });
+    },
+  };
+
+  const callLog = [];
+  function addLoggedCall(fn) {
+    ramblerIdHelper[fn] = () => {
+      callLog.push({ fn, args: arguments });
+    };
+  }
+
+  addLoggedCall("registerOnFrameCloseCallback");
+  addLoggedCall("registerOnFrameRedirect");
+  addLoggedCall("registerOnPossibleLoginCallback");
+  addLoggedCall("registerOnPossibleLogoutCallback");
+  addLoggedCall("registerOnPossibleOauthLoginCallback");
+
+  window.ramblerIdHelper = ramblerIdHelper;
+}
diff --git a/browser/extensions/webcompat/shims/rich-relevance.js b/browser/extensions/webcompat/shims/rich-relevance.js
new file mode 100644
index 0000000000..aea85c030a
--- /dev/null
+++ b/browser/extensions/webcompat/shims/rich-relevance.js
@@ -0,0 +1,288 @@
+/* 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 1713725 - Shim Rich Relevance personalized shopping
+ *
+ * Sites may expect the Rich Relevance personalized shopping API to load,
+ * breaking if it is blocked. This shim attempts to limit breakage on those
+ * site to just the personalized shopping aspects, by stubbing out the APIs.
+ */
+
+if (!window.r3_common) {
+  const jsonCallback = window.RR?.jsonCallback;
+  const defaultCallback = window.RR?.defaultCallback;
+
+  const getRandomString = (l = 66) => {
+    const v = crypto.getRandomValues(new Uint8Array(l));
+    const s = Array.from(v, c => c.toString(16)).join("");
+    return s.slice(0, l);
+  };
+
+  const call = (fn, ...args) => {
+    if (typeof fn === "function") {
+      try {
+        fn(...args);
+      } catch (e) {
+        console.error(e);
+      }
+    }
+  };
+
+  class r3_generic {
+    type = "GENERIC";
+    createScript() {}
+    destroy() {}
+  }
+
+  class r3_addtocart extends r3_generic {
+    type = "ADDTOCART";
+    addItemIdToCart() {}
+  }
+
+  class r3_addtoregistry extends r3_generic {
+    type = "ADDTOREGISTRY";
+    addItemIdCentsQuantity() {}
+  }
+
+  class r3_brand extends r3_generic {
+    type = "BRAND";
+  }
+
+  class r3_cart extends r3_generic {
+    type = "CART";
+    addItemId() {}
+    addItemIdCentsQuantity() {}
+    addItemIdDollarsAndCentsQuantity() {}
+    addItemIdPriceQuantity() {}
+  }
+
+  class r3_category extends r3_generic {
+    type = "CATEGORY";
+    addItemId() {}
+    setId() {}
+    setName() {}
+    setParentId() {}
+    setTopName() {}
+  }
+
+  class r3_common extends r3_generic {
+    type = "COMMON";
+    baseUrl = "https://recs.richrelevance.com/rrserver/";
+    devFlags = {};
+    jsFileName = "p13n_generated.js";
+    RICHSORT = {
+      paginate() {},
+      filterPrice() {},
+      filterAttribute() {},
+    };
+    addCategoryHintId() {}
+    addClickthruParams() {}
+    addContext() {}
+    addFilter() {}
+    addFilterBrand() {}
+    addFilterCategory() {}
+    addItemId() {}
+    addItemIdToCart() {}
+    addPlacementType() {}
+    addRefinement() {}
+    addSearchTerm() {}
+    addSegment() {}
+    blockItemId() {}
+    enableCfrad() {}
+    enableRad() {}
+    forceDebugMode() {}
+    forceDevMode() {}
+    forceDisplayMode() {}
+    forceLocale() {}
+    initFromParams() {}
+    setApiKey() {}
+    setBaseUrl() {}
+    setCartValue() {}
+    setChannel() {}
+    setClickthruServer() {}
+    setCurrency() {}
+    setDeviceId() {}
+    setFilterBrandsIncludeMatchingElements() {}
+    setForcedTreatment() {}
+    setImageServer() {}
+    setLanguage() {}
+    setMVTForcedTreatment() {}
+    setNoCookieMode() {}
+    setPageBrand() {}
+    setPrivateMode() {}
+    setRefinementFallback() {}
+    setRegionId() {}
+    setRegistryId() {}
+    setRegistryType() {}
+    setSessionId() {}
+    setUserId() {}
+    useDummyData() {}
+  }
+
+  class r3_error extends r3_generic {
+    type = "ERROR";
+  }
+
+  class r3_home extends r3_generic {
+    type = "HOME";
+  }
+
+  class r3_item extends r3_generic {
+    type = "ITEM";
+    addAttribute() {}
+    addCategory() {}
+    addCategoryId() {}
+    setBrand() {}
+    setEndDate() {}
+    setId() {}
+    setImageId() {}
+    setLinkId() {}
+    setName() {}
+    setPrice() {}
+    setRating() {}
+    setRecommendable() {}
+    setReleaseDate() {}
+    setSalePrice() {}
+  }
+
+  class r3_personal extends r3_generic {
+    type = "PERSONAL";
+  }
+
+  class r3_purchased extends r3_generic {
+    type = "PURCHASED";
+    addItemId() {}
+    addItemIdCentsQuantity() {}
+    addItemIdDollarsAndCentsQuantity() {}
+    addItemIdPriceQuantity() {}
+    setOrderNumber() {}
+    setPromotionCode() {}
+    setShippingCost() {}
+    setTaxes() {}
+    setTotalPrice() {}
+  }
+
+  class r3_search extends r3_generic {
+    type = "SEARCH";
+    addItemId() {}
+    setTerms() {}
+  }
+
+  class r3_wishlist extends r3_generic {
+    type = "WISHLIST";
+    addItemId() {}
+  }
+
+  const RR = {
+    add() {},
+    addItemId() {},
+    addItemIdCentsQuantity() {},
+    addItemIdDollarsAndCentsQuantity() {},
+    addItemIdPriceQuantity() {},
+    addItemIdToCart() {},
+    addObject() {},
+    addSearchTerm() {},
+    c() {},
+    charset: "UTF-8",
+    checkParamCookieValue: () => null,
+    d: document,
+    data: {
+      JSON: {
+        placements: [],
+      },
+    },
+    debugWindow() {},
+    set defaultCallback(fn) {
+      call(fn);
+    },
+    fixName: n => n,
+    genericAddItemPriceQuantity() {},
+    get() {},
+    getDomElement(a) {
+      return typeof a === "string" && a ? document.querySelector(a) : null;
+    },
+    id() {},
+    insert() {},
+    insertDynamicPlacement() {},
+    isArray: a => Array.isArray(a),
+    js() {},
+    set jsonCallback(fn) {
+      call(fn, {});
+    },
+    l: document.location.href,
+    lc() {},
+    noCookieMode: false,
+    ol() {},
+    onloadCalled: true,
+    pq() {},
+    rcsCookieDefaultDuration: 364,
+    registerPageType() {},
+    registeredPageTypes: {
+      ADDTOCART: r3_addtocart,
+      ADDTOREGISTRY: r3_addtoregistry,
+      BRAND: r3_brand,
+      CART: r3_cart,
+      CATEGORY: r3_category,
+      COMMON: r3_common,
+      ERROR: r3_error,
+      GENERIC: r3_generic,
+      HOME: r3_home,
+      ITEM: r3_item,
+      PERSONAL: r3_personal,
+      PURCHASED: r3_purchased,
+      SEARCH: r3_search,
+      WISHLIST: r3_wishlist,
+    },
+    renderDynamicPlacements() {},
+    set() {},
+    setCharset() {},
+    U: "undefined",
+    unregisterAllPageType() {},
+    unregisterPageType() {},
+  };
+
+  Object.assign(window, {
+    r3() {},
+    r3_addtocart,
+    r3_addtoregistry,
+    r3_brand,
+    r3_cart,
+    r3_category,
+    r3_common,
+    r3_error,
+    r3_generic,
+    r3_home,
+    r3_item,
+    r3_personal,
+    r3_placement() {},
+    r3_purchased,
+    r3_search,
+    r3_wishlist,
+    RR,
+    rr_addLoadEvent() {},
+    rr_annotations_array: [undefined],
+    rr_call_after_flush() {},
+    rr_create_script() {},
+    rr_dynamic: {
+      placements: [],
+    },
+    rr_flush() {},
+    rr_flush_onload() {},
+    rr_insert_placement() {},
+    rr_onload_called: true,
+    rr_placement_place_holders: [],
+    rr_placements: [],
+    rr_recs: {
+      placements: [],
+    },
+    rr_remote_data: getRandomString(),
+    rr_v: "1.2.6.20210212",
+  });
+
+  call(jsonCallback);
+  call(defaultCallback, {});
+}
diff --git a/browser/extensions/webcompat/shims/spotify-embed.js b/browser/extensions/webcompat/shims/spotify-embed.js
new file mode 100644
index 0000000000..62ad05b725
--- /dev/null
+++ b/browser/extensions/webcompat/shims/spotify-embed.js
@@ -0,0 +1,133 @@
+/* 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/. */
+
+/* globals exportFunction */
+
+"use strict";
+
+/**
+ * Spotify embeds default to "track preview mode". They require first-party
+ * storage access in order to detect the login status and allow the user to play
+ * the whole song or add it to their library.
+ * Upon clicking the "play" button in the preview view this shim attempts to get
+ * storage access and on success, reloads the frame and plays the full track.
+ * This only works if the user is already logged in to Spotify in the
+ * first-party context.
+ */
+
+const AUTOPLAY_FLAG = "shimPlayAfterStorageAccess";
+const SELECTOR_PREVIEW_PLAY = 'div[data-testid="preview-play-pause"] > button';
+const SELECTOR_FULL_PLAY = 'button[data-testid="play-pause-button"]';
+
+/**
+ * Promise-wrapper around DOMContentLoaded event.
+ */
+function waitForDOMContentLoaded() {
+  return new Promise(resolve => {
+    window.addEventListener("DOMContentLoaded", resolve, { once: true });
+  });
+}
+
+/**
+ * Listener for the preview playback button which requests storage access and
+ * reloads the page.
+ */
+function previewPlayButtonListener(event) {
+  const { target, isTrusted } = event;
+  if (!isTrusted) {
+    return;
+  }
+
+  const button = target.closest("button");
+  if (!button) {
+    return;
+  }
+
+  // Filter for the preview playback button. This won't match the full
+  // playback button that is shown when the user is logged in.
+  if (!button.matches(SELECTOR_PREVIEW_PLAY)) {
+    return;
+  }
+
+  // The storage access request below runs async so playback won't start
+  // immediately. Mitigate this UX issue by updating the clicked element's
+  // style so the user gets some immediate feedback.
+  button.style.opacity = 0.5;
+  event.stopPropagation();
+  event.preventDefault();
+
+  console.debug("Requesting storage access.", location.origin);
+  document
+    .requestStorageAccess()
+    // When storage access is granted, reload the frame for the embedded
+    // player to detect the login state and give us full playback
+    // capabilities.
+    .then(() => {
+      // Use a flag to indicate that we want to click play after reload.
+      // This is so the user does not have to click play twice.
+      sessionStorage.setItem(AUTOPLAY_FLAG, "true");
+      console.debug("Reloading after storage access grant.");
+      location.reload();
+    })
+    // If the user denies the storage access prompt we can't use the login
+    // state. Attempt start preview playback instead.
+    .catch(() => {
+      button.click();
+    })
+    // Reset button style for both success and error case.
+    .finally(() => {
+      button.style.opacity = 1.0;
+    });
+}
+
+/**
+ * Attempt to start (full) playback. Waits for the play button to appear and
+ * become ready.
+ */
+async function startFullPlayback() {
+  // Wait for DOMContentLoaded before looking for the playback button.
+  await waitForDOMContentLoaded();
+
+  let numTries = 0;
+  let intervalId = setInterval(() => {
+    try {
+      document.querySelector(SELECTOR_FULL_PLAY).click();
+      clearInterval(intervalId);
+      console.debug("Clicked play after storage access grant.");
+    } catch (e) {}
+    numTries++;
+
+    if (numTries >= 50) {
+      console.debug("Can not start playback. Giving up.");
+      clearInterval(intervalId);
+    }
+  }, 200);
+}
+
+(async () => {
+  // Only run the shim for embedded iframes.
+  if (window.top == window) {
+    return;
+  }
+
+  console.warn(
+    `When using the Spotify embedded player, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1792395 for details.`
+  );
+
+  // Already requested storage access before the reload, trigger playback.
+  if (sessionStorage.getItem(AUTOPLAY_FLAG) == "true") {
+    sessionStorage.removeItem(AUTOPLAY_FLAG);
+
+    await startFullPlayback();
+    return;
+  }
+
+  // Wait for the user to click the preview play button. If the player has
+  // already loaded the full version, this method will do nothing.
+  document.documentElement.addEventListener(
+    "click",
+    previewPlayButtonListener,
+    { capture: true }
+  );
+})();
diff --git a/browser/extensions/webcompat/shims/tracking-pixel.png b/browser/extensions/webcompat/shims/tracking-pixel.png
new file mode 100644
index 0000000000..52c591798e
--- /dev/null
+++ b/browser/extensions/webcompat/shims/tracking-pixel.png
diff --git a/browser/extensions/webcompat/shims/vast2.xml b/browser/extensions/webcompat/shims/vast2.xml
new file mode 100644
index 0000000000..3536ccfc0f
--- /dev/null
+++ b/browser/extensions/webcompat/shims/vast2.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 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/.
+
+  Bug 1713693 - Shim Doubleclick
+
+  Some sites rely on an XML VAST Ad response from Doubleclick, or will
+  break (showing black boxes instead of videos, etc). This shim mitigates
+  such breakage.
+-->
+<VAST version="2.0"></VAST>
diff --git a/browser/extensions/webcompat/shims/vast3.xml b/browser/extensions/webcompat/shims/vast3.xml
new file mode 100644
index 0000000000..ae03f0dc14
--- /dev/null
+++ b/browser/extensions/webcompat/shims/vast3.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 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/.
+
+  Bug 1713693 - Shim Doubleclick
+
+  Some sites rely on an XML VAST Ad response from Doubleclick, or will
+  break (showing black boxes instead of videos, etc). This shim mitigates
+  such breakage.
+-->
+<VAST version="3.0"></VAST>
diff --git a/browser/extensions/webcompat/shims/vidible.js b/browser/extensions/webcompat/shims/vidible.js
new file mode 100644
index 0000000000..1d45bc0f7e
--- /dev/null
+++ b/browser/extensions/webcompat/shims/vidible.js
@@ -0,0 +1,424 @@
+/* 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 1713710 - Shim Vidible video player
+ *
+ * Sites relying on Vidible's video player may experience broken videos if that
+ * script is blocked. This shim allows users to opt into viewing those videos
+ * regardless of any tracking consequences, by providing placeholders for each.
+ */
+
+if (!window.vidible?.version) {
+  const PlayIconURL = "https://smartblock.firefox.etp/play.svg";
+
+  const originalScript = document.currentScript.src;
+
+  const getGUID = () => {
+    const v = crypto.getRandomValues(new Uint8Array(20));
+    return Array.from(v, c => c.toString(16)).join("");
+  };
+
+  const sendMessageToAddon = (function () {
+    const shimId = "Vidible";
+    const pendingMessages = new Map();
+    const channel = new MessageChannel();
+    channel.port1.onerror = console.error;
+    channel.port1.onmessage = event => {
+      const { messageId, response } = event.data;
+      const resolve = pendingMessages.get(messageId);
+      if (resolve) {
+        pendingMessages.delete(messageId);
+        resolve(response);
+      }
+    };
+    function reconnect() {
+      const detail = {
+        pendingMessages: [...pendingMessages.values()],
+        port: channel.port2,
+        shimId,
+      };
+      window.dispatchEvent(new CustomEvent("ShimConnects", { detail }));
+    }
+    window.addEventListener("ShimHelperReady", reconnect);
+    reconnect();
+    return function (message) {
+      const messageId = getGUID();
+      return new Promise(resolve => {
+        const payload = { message, messageId, shimId };
+        pendingMessages.set(messageId, resolve);
+        channel.port1.postMessage(payload);
+      });
+    };
+  })();
+
+  const Shimmer = (function () {
+    // If a page might store references to an object before we replace it,
+    // ensure that it only receives proxies to that object created by
+    // `Shimmer.proxy(obj)`. Later when the unshimmed object is created,
+    // call `Shimmer.unshim(proxy, unshimmed)`. This way the references
+    // will automatically "become" the unshimmed object when appropriate.
+
+    const shimmedObjects = new WeakMap();
+    const unshimmedObjects = new Map();
+
+    function proxy(shim) {
+      if (shimmedObjects.has(shim)) {
+        return shimmedObjects.get(shim);
+      }
+
+      const prox = new Proxy(shim, {
+        get: (target, k) => {
+          if (unshimmedObjects.has(prox)) {
+            return unshimmedObjects.get(prox)[k];
+          }
+          return target[k];
+        },
+        apply: (target, thisArg, args) => {
+          if (unshimmedObjects.has(prox)) {
+            return unshimmedObjects.get(prox)(...args);
+          }
+          return target.apply(thisArg, args);
+        },
+        construct: (target, args) => {
+          if (unshimmedObjects.has(prox)) {
+            return new unshimmedObjects.get(prox)(...args);
+          }
+          return new target(...args);
+        },
+      });
+      shimmedObjects.set(shim, prox);
+      shimmedObjects.set(prox, prox);
+
+      for (const key in shim) {
+        const value = shim[key];
+        if (typeof value === "function") {
+          shim[key] = function () {
+            const unshimmed = unshimmedObjects.get(prox);
+            if (unshimmed) {
+              return unshimmed[key].apply(unshimmed, arguments);
+            }
+            return value.apply(this, arguments);
+          };
+        } else if (typeof value !== "object" || value === null) {
+          shim[key] = value;
+        } else {
+          shim[key] = Shimmer.proxy(value);
+        }
+      }
+
+      return prox;
+    }
+
+    function unshim(shim, unshimmed) {
+      unshimmedObjects.set(shim, unshimmed);
+
+      for (const prop in shim) {
+        if (prop in unshimmed) {
+          const un = unshimmed[prop];
+          if (typeof un === "object" && un !== null) {
+            unshim(shim[prop], un);
+          }
+        } else {
+          unshimmedObjects.set(shim[prop], undefined);
+        }
+      }
+    }
+
+    return { proxy, unshim };
+  })();
+
+  const extras = [];
+  const playersByNode = new WeakMap();
+  const playerData = new Map();
+
+  const getJSONPVideoPlacements = () => {
+    return document.querySelectorAll(
+      `script[src*="delivery.vidible.tv/jsonp"]`
+    );
+  };
+
+  const allowVidible = () => {
+    if (allowVidible.promise) {
+      return allowVidible.promise;
+    }
+
+    const shim = window.vidible;
+    window.vidible = undefined;
+
+    allowVidible.promise = sendMessageToAddon("optIn")
+      .then(() => {
+        return new Promise((resolve, reject) => {
+          const script = document.createElement("script");
+          script.src = originalScript;
+          script.addEventListener("load", () => {
+            Shimmer.unshim(shim, window.vidible);
+
+            for (const args of extras) {
+              window.visible.registerExtra(...args);
+            }
+
+            for (const jsonp of getJSONPVideoPlacements()) {
+              const { src } = jsonp;
+              const jscript = document.createElement("script");
+              jscript.onload = resolve;
+              jscript.src = src;
+              jsonp.replaceWith(jscript);
+            }
+
+            for (const [playerShim, data] of playerData.entries()) {
+              const { loadCalled, on, parent, placeholder, setup } = data;
+
+              placeholder?.remove();
+
+              const player = window.vidible.player(parent);
+              Shimmer.unshim(playerShim, player);
+
+              for (const [type, fns] of on.entries()) {
+                for (const fn of fns) {
+                  try {
+                    player.on(type, fn);
+                  } catch (e) {
+                    console.error(e);
+                  }
+                }
+              }
+
+              if (setup) {
+                player.setup(setup);
+              }
+
+              if (loadCalled) {
+                player.load();
+              }
+            }
+
+            resolve();
+          });
+
+          script.addEventListener("error", () => {
+            script.remove();
+            reject();
+          });
+
+          document.head.appendChild(script);
+        });
+      })
+      .catch(() => {
+        window.vidible = shim;
+        delete allowVidible.promise;
+      });
+
+    return allowVidible.promise;
+  };
+
+  const createVideoPlaceholder = (service, callback) => {
+    const placeholder = document.createElement("div");
+    placeholder.style = `
+      position: absolute;
+      width: 100%;
+      height: 100%;
+      min-width: 160px;
+      min-height: 100px;
+      top: 0px;
+      left: 0px;
+      background: #000;
+      color: #fff;
+      text-align: center;
+      cursor: pointer;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      background-image: url(${PlayIconURL});
+      background-position: 50% 47.5%;
+      background-repeat: no-repeat;
+      background-size: 25% 25%;
+      -moz-text-size-adjust: none;
+      -moz-user-select: none;
+      color: #fff;
+      align-items: center;
+      padding-top: 200px;
+      font-size: 14pt;
+    `;
+    placeholder.textContent = `Click to allow blocked ${service} content`;
+    placeholder.addEventListener("click", evt => {
+      evt.isTrusted && callback();
+    });
+    return placeholder;
+  };
+
+  const Player = function (parent) {
+    const existing = playersByNode.get(parent);
+    if (existing) {
+      return existing;
+    }
+
+    const player = Shimmer.proxy(this);
+    playersByNode.set(parent, player);
+
+    const placeholder = createVideoPlaceholder("Vidible", allowVidible);
+    parent.parentNode.insertBefore(placeholder, parent);
+
+    playerData.set(player, {
+      on: new Map(),
+      parent,
+      placeholder,
+    });
+    return player;
+  };
+
+  const changeData = function (fn) {
+    const data = playerData.get(this);
+    if (data) {
+      fn(data);
+      playerData.set(this, data);
+    }
+  };
+
+  Player.prototype = {
+    addEventListener() {},
+    destroy() {
+      const { placeholder } = playerData.get(this);
+      placeholder?.remove();
+      playerData.delete(this);
+    },
+    dispatchEvent() {},
+    getAdsPassedTime() {},
+    getAllMacros() {},
+    getCurrentTime() {},
+    getDuration() {},
+    getHeight() {},
+    getPixelsLog() {},
+    getPlayerContainer() {},
+    getPlayerInfo() {},
+    getPlayerStatus() {},
+    getRequestsLog() {},
+    getStripUrl() {},
+    getVolume() {},
+    getWidth() {},
+    hidePlayReplayControls() {},
+    isMuted() {},
+    isPlaying() {},
+    load() {
+      changeData(data => (data.loadCalled = true));
+    },
+    mute() {},
+    on(type, fn) {
+      changeData(({ on }) => {
+        if (!on.has(type)) {
+          on.set(type, new Set());
+        }
+        on.get(type).add(fn);
+      });
+    },
+    off(type, fn) {
+      changeData(({ on }) => {
+        on.get(type)?.delete(fn);
+      });
+    },
+    overrideMacro() {},
+    pause() {},
+    play() {},
+    playVideoByIndex() {},
+    removeEventListener() {},
+    seekTo() {},
+    sendBirthDate() {},
+    sendKey() {},
+    setup(s) {
+      changeData(data => (data.setup = s));
+      return this;
+    },
+    setVideosToPlay() {},
+    setVolume() {},
+    showPlayReplayControls() {},
+    toggleFullscreen() {},
+    toggleMute() {},
+    togglePlay() {},
+    updateBid() {},
+    version() {},
+    volume() {},
+  };
+
+  const vidible = {
+    ADVERT_CLOSED: "advertClosed",
+    AD_END: "adend",
+    AD_META: "admeta",
+    AD_PAUSED: "adpaused",
+    AD_PLAY: "adplay",
+    AD_START: "adstart",
+    AD_TIMEUPDATE: "adtimeupdate",
+    AD_WAITING: "adwaiting",
+    AGE_GATE_DISPLAYED: "agegatedisplayed",
+    BID_UPDATED: "BidUpdated",
+    CAROUSEL_CLICK: "CarouselClick",
+    CONTEXT_ENDED: "contextended",
+    CONTEXT_STARTED: "contextstarted",
+    ENTER_FULLSCREEN: "playerenterfullscreen",
+    EXIT_FULLSCREEN: "playerexitfullscreen",
+    FALLBACK: "fallback",
+    FLOAT_END_ACTION: "floatended",
+    FLOAT_START_ACTION: "floatstarted",
+    HIDE_PLAY_REPLAY_BUTTON: "hideplayreplaybutton",
+    LIGHTBOX_ACTIVATED: "lightboxactivated",
+    LIGHTBOX_DEACTIVATED: "lightboxdeactivated",
+    MUTE: "Mute",
+    PLAYER_CONTROLS_STATE_CHANGE: "playercontrolsstatechaned",
+    PLAYER_DOCKED: "playerDocked",
+    PLAYER_ERROR: "playererror",
+    PLAYER_FLOATING: "playerFloating",
+    PLAYER_READY: "playerready",
+    PLAYER_RESIZE: "playerresize",
+    PLAYLIST_END: "playlistend",
+    SEEK_END: "SeekEnd",
+    SEEK_START: "SeekStart",
+    SHARE_SCREEN_CLOSED: "sharescreenclosed",
+    SHARE_SCREEN_OPENED: "sharescreenopened",
+    SHOW_PLAY_REPLAY_BUTTON: "showplayreplaybutton",
+    SUBTITLES_DISABLED: "subtitlesdisabled",
+    SUBTITLES_ENABLED: "subtitlesenabled",
+    SUBTITLES_READY: "subtitlesready",
+    UNMUTE: "Unmute",
+    VIDEO_DATA_LOADED: "videodataloaded",
+    VIDEO_END: "videoend",
+    VIDEO_META: "videometadata",
+    VIDEO_MODULE_CREATED: "videomodulecreated",
+    VIDEO_PAUSE: "videopause",
+    VIDEO_PLAY: "videoplay",
+    VIDEO_SEEKEND: "videoseekend",
+    VIDEO_SELECTED: "videoselected",
+    VIDEO_START: "videostart",
+    VIDEO_TIMEUPDATE: "videotimeupdate",
+    VIDEO_VOLUME_CHANGED: "videovolumechanged",
+    VOLUME: "Volume",
+    _getContexts: () => [],
+    "content.CLICK": "content.click",
+    "content.IMPRESSION": "content.impression",
+    "content.QUARTILE": "content.quartile",
+    "content.VIEW": "content.view",
+    createPlayer: parent => new Player(parent),
+    createPlayerAsync: parent => new Player(parent),
+    createVPAIDPlayer: parent => new Player(parent),
+    destroyAll() {},
+    extension() {},
+    getContext() {},
+    player: parent => new Player(parent),
+    playerInceptionTime() {
+      return { undefined: 1620149827713 };
+    },
+    registerExtra(a, b, c) {
+      extras.push([a, b, c]);
+    },
+    version: () => "21.1.313",
+  };
+
+  window.vidible = Shimmer.proxy(vidible);
+
+  for (const jsonp of getJSONPVideoPlacements()) {
+    const player = new Player(jsonp);
+    const { placeholder } = playerData.get(player);
+    jsonp.parentNode.insertBefore(placeholder, jsonp);
+  }
+}
diff --git a/browser/extensions/webcompat/shims/vmad.xml b/browser/extensions/webcompat/shims/vmad.xml
new file mode 100644
index 0000000000..5bb9a5a5d5
--- /dev/null
+++ b/browser/extensions/webcompat/shims/vmad.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 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/.
+
+  Bug 1713693 - Shim Doubleclick
+
+  Some sites rely on an XML VMAD Ad response from Doubleclick, or will
+  break (showing black boxes instead of videos, etc). This shim mitigates
+  such breakage.
+-->
+<vmap:AdBreak></vmap:AdBreak>
diff --git a/browser/extensions/webcompat/shims/webtrends.js b/browser/extensions/webcompat/shims/webtrends.js
new file mode 100644
index 0000000000..c7ef0069da
--- /dev/null
+++ b/browser/extensions/webcompat/shims/webtrends.js
@@ -0,0 +1,46 @@
+/* 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 1766414 - Shim WebTrends Core Tag and Advanced Link Tracking
+ *
+ * Sites using WebTrends Core Tag or Link Tracking can break if they are
+ * are blocked. This shim mitigates that breakage by loading an empty module.
+ */
+
+if (!window.dcsMultiTrack) {
+  window.dcsMultiTrack = o => {
+    o?.callback?.({});
+  };
+}
+
+if (!window.WebTrends) {
+  class dcs {
+    addSelector() {
+      return this;
+    }
+    addTransform() {
+      return this;
+    }
+    DCSext = {};
+    init(obj) {
+      return this;
+    }
+    track() {
+      return this;
+    }
+  }
+
+  window.Webtrends = window.WebTrends = {
+    dcs,
+    multiTrack: window.dcsMultiTrack,
+  };
+
+  window.requestAnimationFrame(() => {
+    window.webtrendsAsyncLoad?.(dcs);
+    window.webtrendsAsyncInit?.();
+  });
+}