Examine source code of SFMC Helper

{
  "manifest_version": 3,
  "name": "SFMC Helper",
  "version": "1.0.0",
  "description": "A toolbox for Salesforce Marketing Cloud power users: encode/decode, code reference, generators, and page context detection.",
  "browser_specific_settings": {
    "gecko": {
      "id": "sfmc-helper@extension",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "48": "icons/sfmc-power-tools-48.png",
    "96": "icons/sfmc-power-tools-96.png"
  },
  "action": {
    "default_title": "SFMC Power Tools",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/sfmc-power-tools-48.png",
      "96": "icons/sfmc-power-tools-96.png"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "clipboardWrite",
    "tabs"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "commands": {
    "toggle-panel": {
      "suggested_key": {
        "default": "Alt+S"
      },
      "description": "Toggle the SFMC Power Tools panel"
    },
    "command-palette": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "Open the SFMC command palette (quick navigation)"
    }
  },
  "host_permissions": [
    "*://*.marketingcloudapis.com/*",
    "*://*.exacttarget.com/*",
    "*://*.marketingcloudapps.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "popup.html",
        "popup.css",
        "js/*",
        "icons/*"
      ],
      "matches": [
        "*://*.exacttarget.com/*",
        "*://*.marketingcloudapps.com/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.exacttarget.com/*",
        "*://*.marketingcloudapps.com/*"
      ],
      "js": [
        "js/content.js"
      ],
      "css": [
        "inpage.css"
      ],
      "run_at": "document_idle"
    }
  ]
}