Examine source code of Bourgad

{
  "manifest_version": 2,
  "name": "Bourgad",
  "description": "Bourgad - Each new tab becomes a donation",
  "version": "1.3.0.0",
  "icons": {
    "16": "16.png",
    "48": "48.png",
    "128": "128.png"
  },
  "author": "Bourgad",
  "browser_action": {
    "default_icon": "16.png",
    "default_title": "Bourgad"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  }
}