update readme

Author: aancw

README.md

@@ -2,4 +2,17 @@
 A browser extension that enhances Frida CodeShare by enabling easy copying and downloading of code snippets as you browse.
 
 ## Installation
-Download the correct browser extension package in the [release page](https://github.com/aancw/codeshare-helper/releases) 
+1. **Download** the latest `codeshare-ext.zip` from the [Releases](https://github.com/aancw/codeshare-helper/releases) page.
+2. **Open your browser:**
+   - **Chrome/Chromium**: Go to `chrome://extensions/`
+   - **Firefox**: Go to `about:debugging`
+3. **Enable Developer Mode**:
+   - **Chrome/Chromium**: Toggle "Developer mode" on.
+   - **Firefox**: Click "This Firefox".
+4. **Load the extension**:
+   - **Chrome/Chromium**: Click "Load unpacked" and select the extracted folder from the `.zip` file.
+   - **Firefox**: Click "Load Temporary Add-on" and choose `manifest.json` from the extracted folder.
+5. **Visit Frida CodeShare** and test the extension.
+
+## License
+This project is licensed under the **MIT License** - see the [LICENSE](LICENSE) file for details.