Examine source code of Marktplaats Cleaner

{
  "manifest_version": 2,
  "name": "Marktplaats Cleaner",
  "version": "1.4",
  "description": "Removes ads and other unwanted elements from Marktplaats.",
  "icons": {
    "32": "icons/logo-32.png",
    "48": "icons/logo-48.png",
    "64": "icons/logo-64.png",
    "96": "icons/logo-96.png",
    "128": "icons/logo-128.png",
    "256": "icons/logo-256.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "MiniX32@github.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.marktplaats.nl/*"
      ],
      "js": [
        "cleaner.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/logo-32.png",
      "48": "icons/logo-48.png",
      "64": "icons/logo-64.png",
      "96": "icons/logo-96.png",
      "128": "icons/logo-128.png",
      "256": "icons/logo-256.png"
    },
    "default_title": "Marktplaats Cleaner",
    "default_popup": "popup/MC_Popup.html"
  }
}