Examine source code of SecureLink Guard

{
  "manifest_version": 2,
  "name": "SecureLink Guard",
  "version": "2.0",
  "description": "Blocks malicious websites before they load and shows a secure warning page.",
  "browser_specific_settings": {
    "gecko": {
      "id": "securelink-guard@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  },
  "permissions": [
    "webNavigation",
    "tabs",
    "storage",
    "contextMenus",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "SecureLink Guard",
    "default_icon": "icon.png"
  }
}