Examine source code of Hide Twitter Trends

{
  "manifest_version": 2,
  "name": "Hide Twitter Trends",
  "description": "Hide the Trends widget on Twitter",
  "version": "0.5.1",
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "js": [
        "hide-twitter-trends.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "listen-for-navigation.js"
    ]
  },
  "permissions": [
    "webNavigation"
  ],
  "icons": {
    "48": "logo.svg",
    "96": "logo.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hide-twitter-trends@lucaswerkmeister.de"
    }
  }
}