Examine source code of Google Ad Blocker

{
  "manifest_version": 2,
  "name": "Google Ad Blocker",
  "description": "Block ads that looks like your search results!",
  "version": "1.2.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/search*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7455c3c2-f18a-4eaf-8653-4bf856c31342}"
    }
  }
}