Examine source code of History Classic

{
  "manifest_version": 2,
  "name": "History Classic",
  "author": "Dylan Sharhon",
  "version": "2.0.0",
  "description": "An old-skool history menu that shows everything",
  "icons": {
    "48": "48.png"
  },
  "permissions": [
    "history"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "History Classic",
    "default_icon": "48.png"
  }
}