Examine source code of Shop Companion

{
  "manifest_version": 2,
  "name": "Shop Companion",
  "short_name": "Shop Companion",
  "description": "Get full-resolution/largest/xxl/best-size product images and videos on various shopping sites. Bookmark products.",
  "version": "0.36",
  "developer": {
    "name": "Evrybase",
    "url": "https://www.evrybase.com/"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "50": "icon50.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.amazon.co.uk/*",
        "*://www.amazon.com/*",
        "*://www.amazon.de/*",
        "*://www.amazon.es/*",
        "*://www.amazon.fr/*",
        "*://www.asos.de/*",
        "*://www.asos.fr/*",
        "*://www.asos.com/*",
        "*://www.bata.at/*",
        "*://www.bata.fr/*",
        "*://www.bata.de/*",
        "*://www.bata.it/*",
        "*://www.bata.lu/*",
        "*://www.bata.pl/*",
        "*://www.bata.pt/*",
        "*://www.bata.sk/*",
        "*://www.bata.es/*",
        "*://www.bata.ch/*",
        "*://nl.bata.eu/*",
        "*://www.batashoes.be/*",
        "*://www.bergdorfgoodman.com/*",
        "*://www.bershka.com/*",
        "*://*.bloomingdales.com/shop/product/*",
        "*://www.breuninger.com/*",
        "*://www.buffalo.de/*",
        "*://www.buffalo.at/*",
        "*://www.buffalo.fr/*",
        "*://www.buffalo-shop.de/*",
        "*://www.buffalo-boots.com/*",
        "*://buffalo-shop.de/*",
        "*://www.deichmann.at/*",
        "*://www.deichmann.de/*",
        "*://www.deichmann.com/*",
        "*://www.dosenbach.ch/*",
        "*://www.goertz.de/*",
        "*://www.hallhuber.com/*",
        "*://www.hm.com/*",
        "*://www.horchow.com/*",
        "*://www.justfab.de/*",
        "*://www.justfab.com/*",
        "*://*.macys.com/shop/product/*",
        "*://www.marksandspencer.com/*",
        "*://www.mirapodo.de/*",
        "*://www.neimanmarcus.com/*",
        "*://www.nelly.de/*",
        "*://www.nelly.com/*",
        "*://nelly.de/*",
        "*://nelly.com/*",
        "*://nlyman.de/*",
        "*://nlyman.com/*",
        "*://www.net-a-porter.com/*",
        "*://shop.nordstrom.com/s/*",
        "*://www.otto.de/*",
        "*://www.roland-schuhe.de/*",
        "*://www.sarenza.com/*",
        "*://www.sarenza.de/*",
        "*://www.uniqlo.de/*",
        "*://www.uniqlo.co.uk/*",
        "*://www.uniqlo.com/*",
        "*://www.walmart.com/ip/*",
        "*://www.yoox.com/*",
        "*://www.zalando.de/*",
        "*://www.zappos.com/*",
        "*://www.zara.com/*",
        "*://www.evrybase.com/shop-companion"
      ],
      "js": [
        "jquery.min.js",
        "shop-companion.js"
      ]
    }
  ],
  "permissions": [
    "storage",
    "contextMenus",
    "tabs"
  ]
}