Examine source code of Subject Summarizer

{
  "manifest_version": 2,
  "name": "Subject Summarizer",
  "version": "1.0",
  "description": "Summarize online content by subject categories for quick learning and review.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Subject Summarizer"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{94cfadcc-f49a-495d-84b1-d1821ecc97b7}"
    }
  }
}