Examine source code of Autofill Extension

{
  "manifest_version": 2,
  "name": "Autofill Extension",
  "version": "1.0",
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{58bc4a6e-8ab4-43eb-bc67-c12e0c8f0079}"
    }
  }
}