Examine source code of not_Tweet

{
  "name": "notTweet",
  "version": "201resigned1",
  "manifest_version": 2,
  "icons": {
    "128": "./icon.png"
  },
  "description": "notTweet",
  "content_scripts": [
    {
      "matches": [
        "https://tweetdeck.twitter.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "index.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0695747d-1e1d-4f18-883b-62c479cd7801}"
    }
  }
}