Examine source code of Site Visits

{
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab",
    "history",
    "tabs",
    "webNavigation"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": "icon.svg",
    "default_title": "Site Visits",
    "default_popup": "popup.html"
  },
  "manifest_version": 2,
  "name": "Site Visits",
  "author": "antishok",
  "version": "0.2.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b69c1023-337e-4646-9d2e-0a90274d1f5d}"
    }
  }
}