Examine source code of Hister

{
  "manifest_version": 3,
  "name": "Hister",
  "version": "0.24.0",
  "description": "Web history on steroids",
  "icons": {
    "128": "assets/icons/icon128.png"
  },
  "action": {
    "default_icon": {
      "128": "assets/icons/icon128.png"
    },
    "default_popup": "popup.html",
    "default_title": "Hister"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_page": "options.html",
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*"
      ],
      "matches": [],
      "extension_ids": []
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "cookies"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzYzQnIbG0kNUBUIrsGGF3x8G8Rz6iy9X5pcxeru+uaxCejx9vm8Sy9frzH8qhs/WWTaqnlyFbvkrL0NxPFfYw7hulP5ew9WNzqk4DJ/rEZHAF9eNhvtMJbIdLRwg6yZiIGmZ+kaCEPKQu+IyHuBMFZNt+n5I/uMEMO9gI5OmK/Z17bQAGVdqlVubqPLTYz4mmtjHhNUK5JGChIHUP238a1X+M87K6QwJNX9lbyXTBCojrYwcgRBWB02IBoevqHoA+wKOCgL6ExGhdkj9N0ons/cUqLvJCop/H3iIl39KCbfKiI5Fc+neOXpa6bzZlfX7EC6kt4J/i/FLncLQUcQbywIDAQAB",
  "content_security_policy": {
    "extension_pages": "script-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0bda7ce-0cda-42dc-9ea8-126b20fed280}",
      "strict_min_version": "110.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "110.0"
    }
  }
}