Examine source code of New Tab Memo

{
  "name": "NewTab Memo",
  "version": "1.1.8resigned1",
  "description": "Transforms Firefox new tabs into memopads. Type, edit, and save text.",
  "chrome_url_overrides": {
    "newtab": "newTab.html"
  },
  "browser_action": {
    "default_icon": "images/icon-128.png",
    "default_title": "NewTab Memo",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "manifest_version": 2,
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "applications": {
    "gecko": {
      "id": "newtabmemo@example.org",
      "strict_min_version": "54.0"
    }
  },
  "web_accessible_resources": [
    "images/align-left.png",
    "images/align-right.png",
    "images/bold.png",
    "images/edit.png",
    "images/icon-mini.png",
    "images/indent-decrease.png",
    "images/indent-increase.png",
    "images/italic.png",
    "images/lock.png",
    "images/options.png",
    "images/reset.png",
    "images/save.png",
    "images/strikethrough.png",
    "images/underline.png"
  ]
}