Examine source code of Animation Toggle Icon

{
  "manifest_version": 2,
  "name": "Animation Toggle Icon",
  "version": "1.1resigned1",
  "description": "Animation toggle icon on browser action",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "default.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{13b3aeaa-570d-4f28-aeff-b77e82f29b11}"
    }
  }
}