Examine source code of MyAnimeTab

{
  "manifest_version": 2,
  "author": "Ari24",
  "description": "A custom startpage for your browser!",
  "name": "MyAnimeTab",
  "short_name": "MyAnimeTab",
  "version": "4.1.1",
  "icons": {
    "192": "icons/favicon.ico",
    "512": "icons/favicon.ico"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "chrome_settings_overrides": {
    "homepage": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "myanimetab@ari24.com"
    }
  }
}