Examine source code of Twitter adblocker

{
  "name": "Twitter adblocker",
  "description": "Block ads on Twitter",
  "manifest_version": 2,
  "version": "1.1.3",
  "homepage_url": "https://github.com/remusao/twitter-adblocker",
  "author": "remusao",
  "icons": {
    "128": "./icon.png"
  },
  "permissions": [
    "https://twitter.com/*"
  ],
  "browser_action": {
    "default_title": "Twitter adblocker"
  },
  "content_scripts": [
    {
      "js": [
        "content-script.js"
      ],
      "matches": [
        "https://twitter.com/*"
      ]
    }
  ]
}