Examine source code of (Dark) Growth Tracker

{
  "manifest_version": 2,
  "name": "Growth Tracker",
  "version": "1.0",
  "description": "Plant-themed journal and mood tracker with offline support.",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "images/grown-logo.png"
    }
  },
  "icons": {
    "128": "images/grown-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2406950a-6ddd-4cbd-85ca-06a2b0fc44e6}"
    }
  }
}