Examine source code of Simple Speeddial

{
  "manifest_version": 2,
  "name": "Simple Speeddial",
  "version": "1.0.3",
  "description": "Simple Speeddial extension.",
  "icons": {
    "48": "asserts/icon48.png"
  },
  "permissions": [
    "https://*/",
    "bookmarks",
    "storage",
    "tabs",
    "activeTab"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab/index.html"
  },
  "background": {
    "scripts": [
      "background/background-script.js"
    ],
    "persistent": true
  }
}