Examine source code of YBlock

{
  "manifest_version": 2,
  "name": "AdBlock+",
  "version": "1.0",
  "description": "Removes the ads from the webpages but FOR REAL.",
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7313cc08-346e-4452-92bd-bb9020bf2518}"
    }
  }
}