Examine source code of NOligarchy

{
  "manifest_version": 3,
  "name": "NOligarchy",
  "version": "1.19.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "noligarchy@noligarchy.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "description": "Shop without bankrolling political power and influence. Works on Amazon, Walmart & Target.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "NOligarchy Settings",
    "default_icon": {
      "16": "icon-16.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  },
  "host_permissions": [
    "*://*.amazon.com/*",
    "*://*.walmart.com/*",
    "*://*.target.com/*",
    "https://noligarchy.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*",
        "*://*.walmart.com/*",
        "*://*.target.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "domain_scores.json"
      ],
      "matches": [
        "*://*.amazon.com/*",
        "*://*.walmart.com/*",
        "*://*.target.com/*"
      ]
    }
  ]
}