Examine source code of Journal Genie

{
  "manifest_version": 3,
  "name": "Journal Genie",
  "version": "1.4.0",
  "description": "Easily switch between multiple accounts on journal websites",
  "permissions": [
    "storage",
    "activeTab",
    "cookies",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Journal Genie",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "commands": {
    "open-manage-accounts": {
      "suggested_key": {
        "default": "Ctrl+Shift+M",
        "mac": "Command+Shift+M"
      },
      "description": "Open Account Manager"
    },
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+J",
        "mac": "Command+Shift+J"
      },
      "description": "Activate the extension"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "manage.html",
        "manage.js",
        "manage.css",
        "bulk-upload.html",
        "bulk-upload.js",
        "bulk-upload.css",
        "lib/sortable.min.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "journal-genie@example.com",
      "strict_min_version": "121.0"
    }
  }
}