Examine source code of Improve

{
  "manifest_version": 2,
  "name": "Improve",
  "version": "2.3",
  "description": "Improve your text with AI",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "src/assets/icons/16x16.png",
      "48": "src/assets/icons/48x48.png",
      "128": "src/assets/icons/128x128.png"
    }
  },
  "permissions": [
    "clipboardWrite",
    "contextMenus",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "src/js/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/js/content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "src/assets/icons/16x16.png",
    "48": "src/assets/icons/48x48.png",
    "128": "src/assets/icons/128x128.png"
  },
  "web_accessible_resources": [
    "prompts/*.txt"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; font-src 'self' https://fonts.gstatic.com; style-src 'self' https://fonts.googleapis.com; connect-src 'self' https://generativelanguage.googleapis.com;",
  "browser_specific_settings": {
    "gecko": {
      "id": "{6af5ec2c-2fa4-4bbf-9780-256193753615}"
    }
  }
}