Examine source code of WPBulkify

{
  "manifest_version": 2,
  "name": "WPBulkify",
  "description": "Bulk install plugins & themes, save reusable profiles, and launch instant WordPress Playground previews — all from your browser.",
  "version": "1.1.2",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "tabs",
    "alarms",
    "notifications",
    "https://*/wp-admin/*",
    "http://*/wp-admin/*",
    "https://wpbulkify.com/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{39a6fc1d-b63d-4265-9bdd-e9cf61d6e34e}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "WordPress Plugin Manager",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/wp-admin/*",
        "https://*/wp-admin/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "https://wpbulkify.com/p/*",
        "https://wpbulkify.com/profiles/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/profile-import.js"
      ]
    }
  ]
}