Examine source code of SEO Speed Optimizer

{
  "manifest_version": 2,
  "name": "SEO Speed Optimizer",
  "version": "1.1",
  "description": "A Mozilla extension to analyze and optimize webpage speed for better SEO.",
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "http://*/",
    "https://*/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/logo_64.png"
  },
  "icons": {
    "64": "icons/logo_64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "icon.png"
  ],
  "content_security_policy": "script-src 'self' https://api.example.com; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{5d3b2928-a2b2-4954-84fe-ed3deccf406c}"
    }
  }
}