Examine source code of SEOSpace - The SEO Plugin

{
  "manifest_version": 2,
  "name": "SEOSpace - The SEO Plugin for Squarespace",
  "description": "SEO Tool for Squarespace websites",
  "version": "2.2.6",
  "permissions": [
    "storage",
    "cookies",
    "scripting"
  ],
  "host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "./logo.png",
      "48": "./logo.png",
      "128": "./logo.png"
    },
    "default_popup": "index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "assets/index.e0e036f7.js"
      ],
      "css": [
        "assets/index.f375d864.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "/assets/*",
    "injectScript.js"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "./logo.png",
    "48": "./logo.png",
    "128": "./logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4104dd51-5610-49c5-bd8e-1dffffaa8a36}"
    }
  }
}