diff --git a/apps/dashboard/src/components/layouts/extension-install-prompt.tsx b/apps/dashboard/src/components/layouts/extension-install-prompt.tsx
index aa03663..01cf185 100644
--- a/apps/dashboard/src/components/layouts/extension-install-prompt.tsx
+++ b/apps/dashboard/src/components/layouts/extension-install-prompt.tsx
@@ -8,7 +8,7 @@ import {
 	recordExtensionInstallPromptDismissed,
 	shouldShowExtensionInstallPrompt,
 } from "#/lib/extension-install-prompt-storage";
-import { siteConfig } from "#/lib/site-config";
+import { getExtensionStoreInstallUrl } from "#/lib/extension-store-url";
 import { useHasMounted } from "#/lib/use-has-mounted";
 
 export function ExtensionInstallPrompt() {
@@ -55,7 +55,7 @@ export function ExtensionInstallPrompt() {
 		return null;
 	}
 
-	const installHref = siteConfig.browserExtensionInstallUrl;
+	const installHref = getExtensionStoreInstallUrl();
 
 	return (
 		<div
diff --git a/apps/dashboard/src/lib/extension-store-url.ts b/apps/dashboard/src/lib/extension-store-url.ts
new file mode 100644
index 0000000..aa05b0a
--- /dev/null
+++ b/apps/dashboard/src/lib/extension-store-url.ts
@@ -0,0 +1,15 @@
+import { siteConfig } from "#/lib/site-config";
+
+/**
+ * Resolves the correct extension listing for the user's browser (Firefox AMO vs Chrome Web Store).
+ */
+export function getExtensionStoreInstallUrl(): string {
+	if (typeof navigator === "undefined") {
+		return siteConfig.chromeExtensionStoreUrl;
+	}
+	const ua = navigator.userAgent;
+	if (/Firefox\//i.test(ua)) {
+		return siteConfig.firefoxExtensionStoreUrl;
+	}
+	return siteConfig.chromeExtensionStoreUrl;
+}
diff --git a/apps/dashboard/src/lib/site-config.ts b/apps/dashboard/src/lib/site-config.ts
index cf241ea..6b29abb 100644
--- a/apps/dashboard/src/lib/site-config.ts
+++ b/apps/dashboard/src/lib/site-config.ts
@@ -2,8 +2,10 @@ type SiteConfig = {
 	name: string;
 	domain: string;
 	url: string;
-	/** Where users install the GitHub → DiffKit redirect browser extension (store or docs). */
-	browserExtensionInstallUrl: string;
+	/** Chrome Web Store URL for the DiffKit redirect extension. */
+	chromeExtensionStoreUrl: string;
+	/** Firefox Add-ons URL for the DiffKit redirect extension. */
+	firefoxExtensionStoreUrl: string;
 	githubRepositoryUrl: string;
 	themeColor: string;
 	socialImagePath: string;
@@ -17,8 +19,10 @@ export const siteConfig: SiteConfig = {
 	name: "DiffKit",
 	domain: "diff-kit.com",
 	url: "https://diff-kit.com",
-	browserExtensionInstallUrl:
-		"https://github.com/stylessh/diffkit/blob/main/extensions/diffkit-redirect/README.md#install-locally",
+	chromeExtensionStoreUrl:
+		"https://chromewebstore.google.com/detail/celjddfjncnnkgfgldobcahfiimlebll/",
+	firefoxExtensionStoreUrl:
+		"https://addons.mozilla.org/en-US/firefox/addon/diffkit/",
 	githubRepositoryUrl: "https://github.com/stylessh/diffkit",
 	themeColor: "#00C943",
 	socialImagePath: "/logo512.png",
diff --git a/extensions/diffkit-redirect/README.md b/extensions/diffkit-redirect/README.md
index cf6a164..bd29b32 100644
--- a/extensions/diffkit-redirect/README.md
+++ b/extensions/diffkit-redirect/README.md
@@ -77,6 +77,19 @@ For an exact URL redirect, use:
 3. Click Load unpacked
 4. Select `extensions/diffkit-redirect`
 
+## Package for Chrome Web Store / Firefox Add-ons
+
+Store uploads expect **`manifest.json` at the root of the ZIP** (not inside a parent folder). Create the archive from inside this directory:
+
+```bash
+cd extensions/diffkit-redirect
+zip -r ../../diffkit-redirect.zip . -x "*.DS_Store"
+```
+
+Then upload `diffkit-redirect.zip`.
+
+Firefox (AMO) requires a **Gecko add-on ID** and **`data_collection_permissions`** in MV3 (`required: ["none"]` here — no developer telemetry). Minimum versions are set for desktop **140+** and Android **142+** to match Firefox data-consent support and `options_page` compatibility. Chrome ignores `browser_specific_settings`.
+
 ## Scope
 
 This version is intentionally limited to `github.com` in `manifest.json`. If you later want redirects from other source hosts, add those hosts to the extension matches and permissions.
diff --git a/extensions/diffkit-redirect/manifest.json b/extensions/diffkit-redirect/manifest.json
index eba61d5..cd54246 100644
--- a/extensions/diffkit-redirect/manifest.json
+++ b/extensions/diffkit-redirect/manifest.json
@@ -1,8 +1,20 @@
 {
   "manifest_version": 3,
   "name": "DiffKit",
-  "version": "0.1.1",
+  "version": "0.1.3",
   "description": "Redirect selected GitHub URLs to matching DiffKit routes.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "diffkit-redirect@diff-kit.com",
+      "strict_min_version": "140.0",
+      "data_collection_permissions": {
+        "required": ["none"]
+      }
+    },
+    "gecko_android": {
+      "strict_min_version": "142.0"
+    }
+  },
   "icons": {
     "16": "icons/icon-16.png",
     "32": "icons/icon-32.png",