Examine source code of FF-TabLaunch

{
  "manifest_version": 2,
  "name": "TabLaunch",
  "version": "1.2.0",
  "description": "Replace Firefox's new tab with a fast, private dashboard of your favorite sites. TabLaunch uses a JSON-configurable settings page to define categorized links, supports search and keyboard navigation, and honors system theme preferences. No external data is collected.",
  "permissions": [
    "storage",
    "browserSettings",
    "tabs"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "xn1ch1@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "chrome_url_overrides": {
    "newtab": "new-tab.html"
  },
  "options_page": "settings.html",
  "icons": {
    "16": "icons/icon-16.svg",
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg"
  }
}