Examine source code of Antyslajd

{
  "manifest_version": 2,
  "name": "Antyslajd",
  "version": "0.1.3",
  "icons": {
    "48": "icon.png"
  },
  "author": "Krop.pl",
  "homepage_url": "https://www.facebook.com/antyslajd/",
  "description": "Usuwa slajdy na kwejk.pl, gazeta.pl i innych portalach.",
  "permissions": [
    "<all_urls>",
    "storage",
    "tabs"
  ],
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "19": "icon19.png",
      "38": "icon38.png"
    },
    "default_title": "Antyslajd"
  },
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "antyslajd.css"
      ],
      "js": [
        "browser-polyfill.js",
        "purify.min.js",
        "rules.js",
        "antyslajd.js"
      ]
    }
  ]
}