Examine source code of Mist Extension

{
  "manifest_version": 3,
  "name": "Mist Extension",
  "short_name": "mist-extension",
  "version": "6.1.0",
  "description": "Web Browser Extension for Mist Developers to provide easier access to Mist APIs",
  "icons": {
    "16": "assets/favicon-16x16.png",
    "48": "assets/favicon-48x48.png",
    "128": "assets/favicon-128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{46f824d5-3c9d-468e-950f-cd2448e488d5}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "index.html?#/popup",
    "default_title": "Mist Extension"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.mist.com/*",
        "https://*.mistsys.com/*",
        "https://*.mist-federal.com/*",
        "https://*.ai.juniper.net/*"
      ],
      "run_at": "document_start",
      "css": [
        "assets/css/mist_dark.css"
      ],
      "js": [
        "assets/js/content_dark.js"
      ]
    },
    {
      "matches": [
        "https://*.mist.com/*",
        "https://*.mistsys.com/*",
        "https://*.mist-federal.com/*",
        "https://*.ai.juniper.net/*"
      ],
      "js": [
        "assets/js/content.js",
        "assets/js/django_links.js",
        "assets/js/django_automation.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "assets/js/bg-common.js",
      "assets/js/bg-firefox.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "permissions": [
    "cookies",
    "tabs",
    "storage",
    "clipboardWrite"
  ],
  "host_permissions": [
    "https://*.mist.com/*",
    "https://*.mistsys.com/*",
    "https://*.mist-federal.com/*",
    "https://*.ai.juniper.net/*"
  ],
  "optional_host_permissions": [
    "https://*.mist.com/*",
    "https://*.mistsys.com/*",
    "https://*.mist-federal.com/*",
    "https://*.ai.juniper.net/*"
  ]
}