Examine source code of Craft Project Tracker

{
  "manifest_version": 2,
  "name": "Craft Project Tracker",
  "version": "1.0",
  "description": "Track your craft projects, materials needed, and progress.",
  "icons": {
    "48": "icons/craft-tracker-icon-48.png"
  },
  "permissions": [],
  "browser_action": {
    "default_icon": "icons/craft-tracker-icon-48.png",
    "default_popup": "popup.html",
    "default_title": "Craft Project Tracker"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eb7dffe9-be10-4f3f-ae01-1d897e8dc09a}"
    }
  }
}