Examine source code of Goal Tracker

{
  "manifest_version": 2,
  "name": "Goal Tracker",
  "version": "1.0",
  "description": "Goal Tracker, daily goals and habits effortlessly, empowering you to build positive routines and achieve personal milestones",
  "icons": {
    "48": "icon1.png"
  },
  "browser_action": {
    "default_icon": "icon1.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ],
  "content_security_policy": "default-src 'self'",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "popup.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{95d5c3fc-a9ae-4da0-b665-5d0e12ed5108}"
    }
  }
}