Examine source code of Charitab

{
  "manifest_version": 2,
  "name": "Charitab",
  "version": "0.9",
  "icons": {
    "48": "cross.svg",
    "96": "cross.svg"
  },
  "description": "Charitab turn new tabs into donations. It replace your 'new tab' default page by it's own and display ads that are used to make donations to charity.",
  "chrome_settings_overrides": {
    "homepage": "newtab.html"
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "permissions": [
    "*://*.suggestqueries.google.com/*",
    "*://*.charitab.org/*",
    "cookies",
    "tabs",
    "topSites",
    "search"
  ]
}