diff --git a/app/robots.ts b/app/robots.ts
new file mode 100644
index 00000000000..41482c55da6
--- /dev/null
+++ b/app/robots.ts
@@ -0,0 +1,28 @@
+import type { MetadataRoute } from "next"
+
+import { SITE_URL } from "@/lib/constants"
+
+export default function robots(): MetadataRoute.Robots {
+  let hostname = ""
+  try {
+    hostname = new URL(SITE_URL).hostname
+  } catch (error) {
+    console.error("Error getting hostname", error)
+  }
+
+  const isProduction = hostname === "ethereum.org"
+
+  if (!isProduction) {
+    return {
+      rules: [{ userAgent: "*", disallow: "/" }],
+      sitemap: [],
+      host: SITE_URL,
+    }
+  }
+
+  return {
+    rules: [{ userAgent: "*", allow: "/" }],
+    sitemap: [`${SITE_URL}/sitemap.xml`],
+    host: SITE_URL,
+  }
+}
diff --git a/next-sitemap.config.js b/next-sitemap.config.js
index daeba00e0d0..f669e865ff7 100644
--- a/next-sitemap.config.js
+++ b/next-sitemap.config.js
@@ -5,8 +5,7 @@ const defaultLocale = "en"
 
 /** @type {import('next-sitemap').IConfig} */
 module.exports = {
-  siteUrl: process.env.SITE_URL || "https://ethereum.org",
-  generateRobotsTxt: true,
+  siteUrl: process.env.NEXT_PUBLIC_SITE_URL || "https://ethereum.org",
   transform: async (_, path) => {
     const rootPath = path.split("/")[1]
     if (path.endsWith("/404")) return null
diff --git a/public/content/ethereum-forks/index.md b/public/content/ethereum-forks/index.md
index 0959357fbe0..03ee0a240b0 100644
--- a/public/content/ethereum-forks/index.md
+++ b/public/content/ethereum-forks/index.md
@@ -73,6 +73,12 @@ Looking for future protocol upgrades? [Learn about upcoming upgrades on the Ethe
 
 ## 2025 {#2025}
 
+### Fulu-Osaka ("Fusaka", _in progress_) {#fusaka}
+
+<NetworkUpgradeSummary name="fusaka" />
+
+[More on Fusaka](/roadmap/fusaka/)
+
 ### Prague-Electra ("Pectra") {#pectra}
 
 <NetworkUpgradeSummary name="pectra" />
diff --git a/src/data/networkUpgradeSummaryData.ts b/src/data/networkUpgradeSummaryData.ts
index 8325faf617b..8b39b45d27c 100644
--- a/src/data/networkUpgradeSummaryData.ts
+++ b/src/data/networkUpgradeSummaryData.ts
@@ -1,6 +1,12 @@
 import type { NetworkUpgradeData } from "@/lib/types"
 
 const networkUpgradeSummaryData: NetworkUpgradeData = {
+  fusaka: {
+    dateTimeAsString: "2025-12-03T21:49:11.000Z",
+    epochNumber: 411392,
+    slotNumber: 411392 * 32,
+    isPending: true,
+  },
   pectra: {
     dateTimeAsString: "2025-05-07T10:05:11.000Z",
     ethPriceInUSD: 2222,
diff --git a/src/data/roadmap/releases.tsx b/src/data/roadmap/releases.tsx
index 5b6f6eab212..3e288be7349 100644
--- a/src/data/roadmap/releases.tsx
+++ b/src/data/roadmap/releases.tsx
@@ -10,7 +10,8 @@ import PectraImage from "@/public/images/roadmap/roadmap-pectra.png"
 type TranslationFunction = (key: string) => string
 
 type DateString =
-  `2${number}${number}${number}-${number}${number}-${number}${number}`
+  | `2${number}${number}${number}-${number}${number}-${number}${number}`
+  | `${number}${number}${number}${number}-${number}${number}-${number}${number}T${number}${number}:${number}${number}:${number}${number}.${number}${number}${number}Z`
 type YearString = `2${number}${number}${number}`
 
 interface BaseRelease {
@@ -143,7 +144,7 @@ export const getReleasesData = (t: TranslationFunction): Release[] => [
   {
     image: FusakaImage,
     releaseName: "Fusaka",
-    plannedReleaseYear: "2025",
+    releaseDate: "2025-12-03T21:49:11.000Z",
     content: (
       <div>
         <p className="font-bold">{t("page-roadmap-fusaka-peerdas-title")}</p>
diff --git a/src/lib/ab-testing/server.ts b/src/lib/ab-testing/server.ts
index 8dd9032787f..34d62e6d9d4 100644
--- a/src/lib/ab-testing/server.ts
+++ b/src/lib/ab-testing/server.ts
@@ -1,10 +1,8 @@
-import { SITE_URL } from "@/lib/constants"
-
 import type { ABTestAssignment, ABTestConfig } from "./types"
 
 const getABTestConfigs = async (): Promise<Record<string, ABTestConfig>> => {
   try {
-    const response = await fetch(`${SITE_URL}/api/ab-config`, {
+    const response = await fetch("https://ethereum.org/api/ab-config", {
       next: { revalidate: 3600 },
     })