diff --git a/README.md b/README.md
index 47ae023..ebe4dca 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,10 @@ npm run dev
 
 Open [http://localhost:3000](http://localhost:3000).
 
+## Chrome Extension
+
+DumpIt includes a Chrome extension for one-click capturing, side panel search, and text selection clipping. For details on local installation and configuration, see the [Extension README](dumpit-extension/README.md).
+
 ## Environment Variables
 
 Use Firebase variables for Firebase only, and Gemini variables for AI only. Do not reuse Firebase keys as Gemini keys.
diff --git a/dumpit-extension/README.md b/dumpit-extension/README.md
new file mode 100644
index 0000000..ddbe9fb
--- /dev/null
+++ b/dumpit-extension/README.md
@@ -0,0 +1,76 @@
+# DumpIt Browser Extension
+
+The DumpIt Chrome Extension is a companion tool that turns your browser into an active Second-Brain. It allows you to save web pages, quotes, snippets, and page contents directly into your DumpIt workspace.
+
+## Core Features
+
+- **One-Click Page Save**: Quick-save the current page URL, title, favicon, and collection info.
+- **Context Menu Scraping**: Highlight any text on a web page, right-click, and select **"Save to DumpIt"** to store quotes and research snippets.
+- **Smart DOM Content Extraction**: Securely extracts the readable DOM content of dynamic or authenticated webpages directly from your browser tab, bypassing server-side crawling issues.
+- **Persistent Side Panel**: Inspect saved pages, write quick notes, manage visibility, select target collections, and ask AI questions about the page in real-time.
+- **Web Session Synchronization**: Logs in automatically. Once you authenticate on the DumpIt web app, the session token is securely synchronized in-memory using origin-restricted DOM events.
+
+---
+
+## Local Installation Guide
+
+Since the extension is built from source and not hosted on the Chrome Web Store, follow these steps to load it into your Chrome browser:
+
+### 1. Build the Extension Locally
+
+1. Navigate to the extension folder:
+   ```bash
+   cd dumpit-extension
+   ```
+2. Install all development dependencies:
+   ```bash
+   npm install
+   ```
+3. Create your local environment configuration file:
+   - Create a file named `.env` in the `dumpit-extension/` directory.
+   - Fill in your Firebase config parameters:
+     ```env
+     VITE_FIREBASE_API_KEY=your_firebase_api_key
+     VITE_FIREBASE_AUTH_DOMAIN=your_project.firebaseapp.com
+     VITE_FIREBASE_PROJECT_ID=your_project_id
+     VITE_FIREBASE_STORAGE_BUCKET=your_project.firebasestorage.app
+     VITE_FIREBASE_MESSAGING_SENDER_ID=your_sender_id
+     VITE_FIREBASE_APP_ID=your_app_id
+     ```
+4. Compile the production extension package:
+   ```bash
+   npm run build
+   ```
+   This generates a compiled `dist/` directory containing the `manifest.json`, background service worker, and UI assets.
+
+### 2. Load the Unpacked Extension into Chrome
+
+1. Open Google Chrome and navigate to:
+   ```text
+   chrome://extensions/
+   ```
+2. In the top-right corner, toggle the **"Developer mode"** switch to **ON**.
+3. In the top-left, click the **"Load unpacked"** button.
+4. Select the compiled **`dumpit-extension/dist`** directory (do NOT select the root source folder).
+5. The **DumpIt Vault** extension is now installed and active! Pin it to your extension toolbar for easy access.
+
+---
+
+## Development Workflow
+
+- Run Vite in developer watch mode with Hot Module Replacement (HMR):
+  ```bash
+  npm run dev
+  ```
+- Build the final production extension:
+  ```bash
+  npm run build
+  ```
+
+---
+
+## Authentication Syncing Security
+To log in, click **"Sign In via Web App"** in the extension UI. This opens your configured DumpIt web dashboard.
+- The web application securely dispatches the Firebase `idToken` to the document via a custom event (`DUMPIT_EXTENSION_AUTH`).
+- The extension's content script intercepts this event **only** on trusted matching origins (`http://localhost:3000` or your configured production API domain), verifying and writing the token to the extension's local storage.
+- The token is a standard JWT that automatically expires in **1 hour**, keeping your session completely secure.
diff --git a/dumpit-extension/src/lib/firebase.ts b/dumpit-extension/src/lib/firebase.ts
index a9858a8..048d382 100644
--- a/dumpit-extension/src/lib/firebase.ts
+++ b/dumpit-extension/src/lib/firebase.ts
@@ -2,12 +2,12 @@ import { initializeApp, getApps } from 'firebase/app';
 import { initializeAuth, indexedDBLocalPersistence, Auth } from 'firebase/auth';
 
 const firebaseConfig = {
-  apiKey: import.meta.env.VITE_FIREBASE_API_KEY || "AIzaSyDwKvdZL1oJ3vSV94qUsjmYLbMGFkL81uQ",
-  authDomain: import.meta.env.VITE_FIREBASE_AUTH_DOMAIN || "dumpit-62870.firebaseapp.com",
-  projectId: import.meta.env.VITE_FIREBASE_PROJECT_ID || "dumpit-62870",
-  storageBucket: import.meta.env.VITE_FIREBASE_STORAGE_BUCKET || "dumpit-62870.firebasestorage.app",
-  messagingSenderId: import.meta.env.VITE_FIREBASE_MESSAGING_SENDER_ID || "794186381857",
-  appId: import.meta.env.VITE_FIREBASE_APP_ID || "1:794186381857:web:aa610f8550dd96eb7dc160"
+  apiKey: import.meta.env.VITE_FIREBASE_API_KEY || "",
+  authDomain: import.meta.env.VITE_FIREBASE_AUTH_DOMAIN || "",
+  projectId: import.meta.env.VITE_FIREBASE_PROJECT_ID || "",
+  storageBucket: import.meta.env.VITE_FIREBASE_STORAGE_BUCKET || "",
+  messagingSenderId: import.meta.env.VITE_FIREBASE_MESSAGING_SENDER_ID || "",
+  appId: import.meta.env.VITE_FIREBASE_APP_ID || ""
 };
 
 const app = getApps().length === 0 ? initializeApp(firebaseConfig) : getApps()[0];