Examine source code of Browser Notepad

{
  "manifest_version": 2,
  "name": "Browser Notepad",
  "version": "1.83.1",
  "description": "Browser Notepad, a simple text-editor in the browser and has complete offline functionality. This is a 100% privacy-friendly add-on because it does not access any of your data, change the settings in your browser, or monitor any browser activities.",
  "icons": {
    "128": "images/bte.png"
  },
  "background": {
    "scripts": [
      "Browser_Notepad.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "images/19/bte.png",
      "38": "images/38/bte.png"
    },
    "default_title": "Browser Notepad"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f1c440d8-c8eb-4ba0-b5f1-85e059d35c18}"
    }
  }
}