Examine source code of Incest Eraser

{
  "manifest_version": 2,
  "name": "Incest Eraser",
  "version": "1.0",
  "description": "Replaces instances of incestous sounding text on websites where that might turn you off.",
  "icons": {
    "48": "icons/text-icon.png"
  },
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      ],
      "js": [
        "incest-eraser.js"
      ]
    }
  ]
}