Examine source code of Remove Floating Banners

{
  "name": "Remove Floating Banners",
  "description": "Removes the annoying floating / sticky banners that take up screen space as you scroll down a page. ",
  "version": "1.3",
  "manifest_version": 2,
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "build/background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab"
  ]
}