Examine source code of Google Adblocker

{
  "manifest_version": 2,
  "name": "Google Adblocker",
  "version": "1.0.1resigned1",
  "description": "Blocks all Google search ads and content ads.",
  "icons": {
    "64": "icon.png"
  },
  "applications": {
    "gecko": {
      "id": "@google-adblocker"
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "index.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "block.js"
      ]
    }
  ]
}