Examine source code of Verified Tweets Only

{
  "name": "Verified Tweets Only",
  "version": "0.0.1",
  "manifest_version": 2,
  "description": "Simple extension to only show verified tweets on Twitter",
  "icons": {
    "16": "icons/icon_on.png",
    "48": "icons/icon_on.png",
    "128": "icons/icon_on.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://twitter.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "storage.js",
        "contentscript.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "page_action": {
    "default_icon": {
      "19": "icons/icon_on.png",
      "38": "icons/icon_on.png"
    },
    "default_popup": "popup.html",
    "default_title": "Verified Tweets Only"
  }
}