Examine source code of Automatic zoom

{
  "applications": {
    "gecko": {
      "strict_min_version": "58.0a1",
      "id": "{ace613a4-392e-4f1f-9946-1f358c9ff27c}"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "description": "Automatic zoom",
  "manifest_version": 2,
  "name": "Automatic zoom",
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "version": "1.2resigned1"
}