Examine source code of SecureGen

{
  "manifest_version": 2,
  "name": "SecureGen",
  "version": "1.0.0",
  "description": "Generate secure passwords with right-click context menu for password fields",
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "SecureGen Password Generator"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{766a7814-e15b-414f-8b1d-84b318523acf}"
    }
  }
}