Update to version 1.0.6 with Firefox support and improved extension management

- Add Firefox extension support with Manifest V2
- Update all version numbers to 1.0.6
- Build Chrome and Firefox extension packages
- Clean up extension directory structure
- Update README with Firefox installation instructions
- Update server messages to mention Chrome/Firefox support
- Add .gitignore for extension directory
- Create release packages for both browsers

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

opendia-extension/manifest.json

@@ -1,8 +1,8 @@
 {
   "manifest_version": 3,
   "name": "OpenDia",
-  "version": "1.0.5",
-  "description": "Browser automation through Model Context Protocol",
+  "version": "1.0.6",
+  "description": "Connect your browser to AI models",
   "icons": {
     "16": "icon-16.png",
     "32": "icon-32.png",