Examine source code of Scrive Go

{
  "name": "Scrive Go - Beta",
  "version": "0.0.0.2",
  "author": "Scrive AB",
  "manifest_version": 2,
  "icons": {
    "16": "assets/icon-16x16.png",
    "48": "assets/icon-48x48.png",
    "128": "assets/icon-128x128.png"
  },
  "browser_action": {
    "default_title": "Scrive Go",
    "default_icon": "assets/icon-16x16.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "<all_urls>",
    "webRequest",
    "activeTab",
    "storage",
    "unlimitedStorage",
    "identity"
  ]
}