Examine source code of inoreader-popup-blocker

{
  "description": "Blocks popup about blocking ads on Inoreader",
  "manifest_version": 2,
  "name": "inoreader-blocker",
  "version": "1.0.0",
  "author": "Macko Martin",
  "content_scripts": [
    {
      "matches": [
        "*://*.inoreader.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}