Examine source code of Veryfly

{
  "manifest_version": 2,
  "name": "Veryfly",
  "version": "1.0",
  "description": "Removes all tweets from verified users on twitter dot com",
  "icons": {
    "48": "icons/slash.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "veryfly.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{812e0b42-e732-4995-85ae-7bb682f00ba9}"
    }
  }
}