Examine source code of AntiVeri

{
  "manifest_version": 2,
  "name": "AntiVeri",
  "version": "1.0",
  "description": "Removes the 'verified' tab from the twitter notifications screen. You can still get to the page but the button will be deleted on load.",
  "icons": {
    "32": "icons/AntiVeri32.png",
    "48": "icons/AntiVeri48.png",
    "64": "icons/AntiVeri64.png",
    "128": "icons/AntiVeri128.png",
    "640": "icons/AntiVeriFull.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "js": [
        "scripts/content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3835d3a5-cf0b-42c6-a9c5-6864f1c37975}"
    }
  }
}