diff --git a/scripts/vendor-zoo-modeling-app.mjs b/scripts/vendor-zoo-modeling-app.mjs
index ebd939eb8..56cc5a91d 100644
--- a/scripts/vendor-zoo-modeling-app.mjs
+++ b/scripts/vendor-zoo-modeling-app.mjs
@@ -30,6 +30,7 @@ const sourceRefFile = path.join(sourceDir, ".hicad-source-ref");
 const outputDir = path.join(root, "public/vendor/zoo-modeling-app");
 const customizationDir = path.join(root, "vendor/zoo-modeling-app");
 const proxyToken = "hicad-session";
+const brandedFaviconUrl = "/api/favicon?surface=hicad";
 
 function run(command, args, options = {}) {
   const result = spawnSync(command, args, {
@@ -112,6 +113,22 @@ function replaceSource(relativePath, before, after) {
   writeFileSync(filePath, source.replace(before, after));
 }
 
+function patchOfficialManifest() {
+  const manifestPath = path.join(sourceDir, "public/manifest.json");
+  const manifest = JSON.parse(readFileSync(manifestPath, "utf8"));
+
+  manifest.short_name = "HiCAD";
+  manifest.name = "HiCAD";
+  manifest.icons = [
+    {
+      src: brandedFaviconUrl,
+      sizes: "any",
+    },
+  ];
+
+  writeFileSync(manifestPath, `${JSON.stringify(manifest, null, 2)}\n`);
+}
+
 function patchOfficialSource() {
   copyFileSync(
     path.join(customizationDir, "Logo.tsx"),
@@ -130,6 +147,17 @@ function patchOfficialSource() {
     '  <meta name="description" content="An open-source CAD modeling tool from the future by Zoo." />',
     '  <meta name="description" content="HiCAD browser-based CAD workspace." />'
   );
+  replaceSource(
+    "index.html",
+    '  <link rel="icon" href="/favicon.ico" />',
+    `  <link rel="icon" href="${brandedFaviconUrl}" />`
+  );
+  replaceSource(
+    "index.html",
+    '  <link rel="apple-touch-icon" href="/logo192.png" />',
+    `  <link rel="apple-touch-icon" href="${brandedFaviconUrl}" />`
+  );
+  patchOfficialManifest();
   replaceSource(
     "index.html",
     '  <script defer data-domain="app.zoo.dev" src="https://plausible.corp.zoo.dev/js/script.tagged-events.js"></script>\n',
diff --git a/tests/routes/hicad-embedded-performance.test.ts b/tests/routes/hicad-embedded-performance.test.ts
index 184850ad8..3f6ac4df0 100644
--- a/tests/routes/hicad-embedded-performance.test.ts
+++ b/tests/routes/hicad-embedded-performance.test.ts
@@ -16,6 +16,26 @@ test.describe("HiCAD embedded startup", () => {
     expect(vendorScript).toContain(latestReviewedOfficialCommit);
   });
 
+  test("uses the website favicon across embedded browser surfaces", () => {
+    const vendorScript = fs.readFileSync(
+      path.join(projectRoot, "scripts/vendor-zoo-modeling-app.mjs"),
+      "utf8"
+    );
+
+    expect(vendorScript).toContain(
+      'const brandedFaviconUrl = "/api/favicon?surface=hicad"'
+    );
+    expect(vendorScript).toContain(
+      '`  <link rel="icon" href="${brandedFaviconUrl}" />`'
+    );
+    expect(vendorScript).toContain(
+      '`  <link rel="apple-touch-icon" href="${brandedFaviconUrl}" />`'
+    );
+    expect(vendorScript).toMatch(
+      /manifest\.icons = \[\s*\{\s*src: brandedFaviconUrl,\s*sizes: "any",/
+    );
+  });
+
   test("suppresses the upstream onboarding chooser in embedded mode", () => {
     const vendorScript = fs.readFileSync(
       path.join(projectRoot, "scripts/vendor-zoo-modeling-app.mjs"),