Examine source code of Remove StartPage Ads

{
  "name": "Remove StartPage Ads",
  "description": "Removes ads from all webpages matching startpage.com.",
  "manifest_version": 2,
  "version": "1.0.0",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.startpage.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}