Examine source code of No Trend Twitter

{
  "name": "No Trend Twitter",
  "version": "1.0",
  "manifest_version": 2,
  "description": "An extension to hide the Twitter Trending Topics",
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*"
      ],
      "css": [
        "hide.css"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "No Trend Twitter",
    "default_icon": "icon.png"
  }
}