Examine source code of Substack Friend Finder

{
  "manifest_version": 2,
  "name": "Substack Friend Finder",
  "version": "1.0.0",
  "description": "Find people who share your niche reading interests on Substack",
  "homepage_url": "https://github.com/vanshkumar/substack-friend-finder",
  "browser_specific_settings": {
    "gecko": {
      "id": "substack-friend-finder@vanshkumar",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "assets/icon16.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "*://*.substack.com/*"
  ],
  "browser_action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "assets/icon16.png",
      "48": "assets/icon48.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.substack.com/*",
        "*://substack.com/*"
      ],
      "js": [
        "src/content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "src/content/injected.js"
  ],
  "background": {
    "scripts": [
      "src/background/background.js"
    ]
  }
}