Examine source code of Social Balance

{
  "name": "Social Balance - Full",
  "description": "Turns browsing social media into a game with a health bar and a timer.",
  "version": "1.4",
  "manifest_version": 3,
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "socialBalanceSettings.html",
    "default_icon": "icon.png"
  },
  "options_ui": {
    "page": "socialBalanceSettings.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "socialbalance@quietforgesoftware.com",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent",
          "websiteActivity"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.x.com/*",
        "https://*.reddit.com/*",
        "https://*.linkedin.com/*"
      ],
      "css": [
        "css/inject.css"
      ],
      "js": [
        "scripts/plan.js",
        "scripts/storage.js",
        "scripts/overlay.js",
        "scripts/siteHandlers.js",
        "scripts/inject.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://*.reddit.com/*",
    "https://*.linkedin.com/*"
  ]
}