diff --git a/extension/PRIVACY.md b/extension/PRIVACY.md
index 56f56ea..0eb04a7 100644
--- a/extension/PRIVACY.md
+++ b/extension/PRIVACY.md
@@ -4,7 +4,7 @@
 
 ## Overview
 
-WebMCP Bridge is an open-source Chrome extension that connects tools registered on web pages (via the `navigator.modelContext` browser API) to local AI assistants through Model Context Protocol (MCP). It does not collect, store, or transmit any personal data.
+WebMCP Bridge is an open-source Chrome extension that connects tools registered on web pages (via the `document.modelContext` browser API) to local AI assistants through Model Context Protocol (MCP). It does not collect, store, or transmit any personal data.
 
 ## What data does the extension access?
 
diff --git a/extension/README.md b/extension/README.md
index 5ee4739..1f8bf0c 100644
--- a/extension/README.md
+++ b/extension/README.md
@@ -1,12 +1,12 @@
 # WebMCP Bridge Server Chrome Extension
 
-A Chrome extension that bridges tools registered on `navigator.modelContext` to desktop AI clients (Claude Code, Cursor, etc.) via MCP.
+A Chrome extension that bridges tools registered on `document.modelContext` to desktop AI clients (Claude Code, Cursor, etc.) via MCP.
 
 > Note: This extension is a workaround for now. Once Chrome natively supports some bridge solution, I'll deprecate this extension.
 
 ## How it works
 
-Your React app registers tools using `webmcp-react`. The extension picks them up from `navigator.modelContext`, aggregates tools across all active tabs, and exposes them through a local MCP server that clients connect to over stdio.
+Your React app registers tools using `webmcp-react`. The extension picks them up via `navigator.modelContextTesting`, aggregates tools across all active tabs, and exposes them through a local MCP server that clients connect to over stdio.
 
 ![Extension architecture](./extension-architecture.svg)
 
@@ -97,7 +97,7 @@ After rebuilding, click the reload button on `chrome://extensions/` to pick up c
 ```
 src/
 ├── background.ts          # Service worker — manages tabs, tools, WebSocket
-├── content-main.ts        # Main world script — reads navigator.modelContext
+├── content-main.ts        # Main world script — reads navigator.modelContextTesting
 ├── content-isolated.ts    # Isolated world script — bridges messages
 ├── types.ts               # Shared type definitions
 ├── popup/
diff --git a/package.json b/package.json
index b7d966b..7d88856 100644
--- a/package.json
+++ b/package.json
@@ -56,6 +56,7 @@
     "dev:nextjs": "pnpm --filter webmcp-react-nextjs-example dev",
     "build:extension": "pnpm --filter webmcp-bridge-extension build",
     "typecheck:extension": "pnpm --filter webmcp-bridge-extension typecheck",
+    "prepublishOnly": "pnpm build",
     "prepare": "husky"
   },
   "peerDependencies": {