Examine source code of SEO Minion Declaration V2

{
  "manifest_version": 2,
  "name": "SEO Minion Declaration V2",
  "version": "1.3",
  "description": "SEO Minion Declaration V2 - A Mozilla Extension for SEO analysis and declarations.",
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "64": "icons/logo_64.png"
    }
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3590bc4-731a-423f-813d-1ff3ea041710}"
    }
  }
}