diff --git a/ts/routes/reviewer-inner/index.ts b/ts/routes/reviewer-inner/index.ts
index 143afaae9..67108f940 100644
--- a/ts/routes/reviewer-inner/index.ts
+++ b/ts/routes/reviewer-inner/index.ts
@@ -2,12 +2,22 @@
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 import "../base.scss";
 import "../../reviewer/reviewer.scss";
+
 import "mathjax/es5/tex-chtml-full.js";
 import { renderError } from "../../reviewer";
+import { addBrowserClasses } from "../../reviewer/browser_selector";
+import { imageOcclusionAPI } from "../image-occlusion/review";
 import { enableNightMode } from "../reviewer/reviewer";
 import type { ReviewerRequest } from "../reviewer/reviewerRequest";
 import type { InnerReviewerRequest } from "./innerReviewerRequest";
 
+const anki = globalThis.anki || {};
+anki.imageOcclusion = imageOcclusionAPI;
+anki.setupImageCloze = imageOcclusionAPI.setup; // deprecated
+addBrowserClasses();
+
+Object.defineProperty(window, "anki", { value: anki });
+
 function postParentMessage(message: ReviewerRequest) {
     window.parent.postMessage(
         message,