Examine source code of Daily Task Manager

{
  "manifest_version": 2,
  "name": "Daily Task Manager",
  "description": "Manage and track your daily tasks easily.",
  "version": "1.0",
  "permissions": [],
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4c505546-c4a9-4958-bc69-ed2fc443b13c}"
    }
  }
}