Examine source code of Wikipedia Logger

{
  "manifest_version": 2,
  "name": "Wikipedia Logger",
  "version": "3.0",
  "description": "Logs Wikipedia visits with timestamps and excerpts.",
  "license": "AGPL-3.0",
  "applications": {
    "gecko": {
      "id": "{bbd6f62d-dbaf-411f-8c40-0ce5e6f4b4cb}"
    }
  },
  "icons": {
    "48": "logo.svg",
    "96": "logo.svg"
  },
  "permissions": [
    "storage",
    "alarms",
    "tabs",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/wiki/*"
      ],
      "js": [
        "storage.js",
        "content.js"
      ],
      "css": [
        "overlay.css"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_popup": "popup/popup.html"
  },
  "options_page": "settings/settings.html"
}