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-chrome.json

@@ -0,0 +1,46 @@
+{
+  "manifest_version": 3,
+  "name": "OpenDia",
+  "version": "1.0.6",
+  "description": "Connect your browser to AI models",
+  "icons": {
+    "16": "icons/icon-16.png",
+    "32": "icons/icon-32.png",
+    "48": "icons/icon-48.png",
+    "128": "icons/icon-128.png"
+  },
+  "permissions": [
+    "tabs",
+    "activeTab",
+    "storage",
+    "scripting",
+    "webNavigation",
+    "notifications",
+    "bookmarks",
+    "history"
+  ],
+  "host_permissions": [
+    "<all_urls>"
+  ],
+  "background": {
+    "service_worker": "src/background/background.js",
+    "type": "module"
+  },
+  "action": {
+    "default_popup": "src/popup/popup.html",
+    "default_title": "OpenDia"
+  },
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["src/polyfill/browser-polyfill.min.js", "src/content/content.js"],
+      "run_at": "document_idle"
+    }
+  ],
+  "web_accessible_resources": [
+    {
+      "resources": ["src/polyfill/browser-polyfill.min.js"],
+      "matches": ["<all_urls>"]
+    }
+  ]
+}