Examine source code of MadNotes

{
  "manifest_version": 2,
  "name": "MadNotes",
  "description": "Minimalistic markdown notepad. Boost your efficiency with quick note-taking app.",
  "version": "2.0.3",
  "author": "Department of Web",
  "homepage_url": "https://madnotes.app",
  "icons": {
    "32": "icon-32.png",
    "64": "icon-64.png",
    "128": "icon-128.png"
  },
  "chrome_url_overrides": {
    "newtab": "plugin.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{20edfcc2-764c-49e2-8777-7b9d54fda9e8}"
    }
  }
}