Examine source code of QuickNotes Plus

{
  "manifest_version": 2,
  "name": "QuickNotes Pro",
  "version": "1.1",
  "description": "Instant sticky notes that save per website. Jot ideas, passwords, reminders — always right where you need them.",
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png"
    },
    "default_title": "QuickNotes Pro"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "quicknotes-pro@nichols.productions",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icon48.png"
  }
}