Examine source code of Ef Five

{
  "manifest_version": 2,
  "name": "Ef Five",
  "version": "1.1resigned1",
  "description": "Keeps reloading your page.",
  "icons": {
    "24": "icons/reload-24.png",
    "48": "icons/reload-48.png"
  },
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/reload-48.png",
    "default_title": "F5",
    "default_popup": "f5.html"
  },
  "background": {
    "scripts": [
      "background-f5.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3e2c0164-9104-4726-a6d1-91faec4e42b3}"
    }
  }
}