Examine source code of Via

{
  "name": "Via",
  "version": "3.2.8",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": "/img/via-icon-off-76.png"
  },
  "default_locale": "en",
  "icons": {
    "128": "/img/via-icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.joinvia.app/*"
      ],
      "js": [
        "/content.js"
      ]
    },
    {
      "matches": [
        "*://*.adidas.co.uk/*",
        "*://*.adidas.com/*",
        "*://*.ao.com/*",
        "*://*.albertsons.com/*",
        "*://*.aldi.us/*",
        "*://*.asda.com/*",
        "*://*.aldi.co.uk/*",
        "*://*.aliexpress.com/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.com/*",
        "*://*.amazon.in/*",
        "*://*.apmex.com/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.nl/*",
        "*://*.arco.co.uk/*",
        "*://*.argos.co.uk/*",
        "*://*.asos.com/*",
        "*://*.avenue.com/*",
        "*://*.bedbathandbeyond.com/*",
        "*://*.belk.com/*",
        "*://*.bestbuy.ca/*",
        "*://*.bestbuy.com/*",
        "*://*.bjs.com/*",
        "*://*.blacks.co.uk/*",
        "*://*.boohoo.com/*",
        "*://*.boots.com/*",
        "*://*.chewy.com/*",
        "*://*.costco.com/*",
        "*://*.craghoppers.com/*",
        "*://*.currys.co.uk/*",
        "*://*.cvs.com/*",
        "*://*.debenhams.com/*",
        "*://*.decathlon.co.uk/*",
        "*://*.decathlon.com/*",
        "*://*.dell.com/*",
        "*://*.dhgate.com/*",
        "*://*.dunelm.com/*",
        "*://*.ebay.co.uk/*",
        "*://*.ebay.com/*",
        "*://*.ebth.com/*",
        "*://*.etsy.com/*",
        "*://*.footasylum.com/*",
        "*://*.forever21.com/*",
        "*://*.gap.com/*",
        "*://*.gelert.com/*",
        "*://*.gooutdoors.co.uk/*",
        "*://*.groceries.asda.com/*",
        "*://*.groceries.morrisons.com/*",
        "*://*.hollar.com/*",
        "*://*.homedepot.com/*",
        "*://*.hondoscenter.com/*",
        "*://*.hotukdeals.com/*",
        "*://*.hsn.com/*",
        "*://*.hy-vee.com/*",
        "*://*.instacart.com/*",
        "*://*.jane.com/*",
        "*://*.jcpenney.com/*",
        "*://*.kay.com/*",
        "*://*.kohls.com/*",
        "*://*.kroger.com/*",
        "*://*.latestdeals.co.uk/*",
        "*://*.listia.com/*",
        "*://*.loft.com/*",
        "*://*.lowes.com/*",
        "*://*.lyst.com/*",
        "*://*.macys.com/*",
        "*://*.meijer.com/*",
        "*://*.missguided.co.uk/*",
        "*://*.missguidedus.com/*",
        "*://*.nerdom.gr/*",
        "*://*.newegg.com/*",
        "*://*.next.co.uk/*",
        "*://*.nextdirect.com/*",
        "*://*.nordstrom.com/*",
        "*://*.nordstromrack.com/*",
        "*://*.ocado.com/*",
        "*://*.overstock.com/*",
        "*://*.patagonia.com/*",
        "*://*.poshmark.com/*",
        "*://*.prettylittlething.com/*",
        "*://*.prettylittlething.us/*",
        "*://*.publix.com/*",
        "*://*.qvc.com/*",
        "*://*.safeway.com/*",
        "*://*.sainsburys.co.uk/*",
        "*://*.samsclub.com/*",
        "*://*.schuh.co.uk/*",
        "*://*.selectfashion.co.uk/*",
        "*://*.selfridges.com/*",
        "*://*.shipt.com/*",
        "*://*.shoprite.com/*",
        "*://*.skechers.com/*",
        "*://*.slickdeals.net/*",
        "*://*.sportsdirect.com/*",
        "*://*.staples.com/*",
        "*://*.stauer.com/*",
        "*://*.target.com/*",
        "*://*.tesco.com/*",
        "*://*.thenorthface.co.uk/*",
        "*://*.thenorthface.com/*",
        "*://*.timberland.com/*",
        "*://*.tkmaxx.com/*",
        "*://*.urbanoutfitters.com/*",
        "*://*.victoriassecret.com/*",
        "*://*.very.co.uk/*",
        "*://*.waitrose.com/*",
        "*://*.walmart.com/*",
        "*://*.wayfair.com/*",
        "*://*.wayfair.co.uk/*",
        "*://*.wholefoodsmarket.com/*",
        "*://*.wish.com/*",
        "*://*.woot.com/*",
        "*://*.zalando.co.uk/*",
        "*://*.zalando.com/*",
        "*://*.zappos.com/*",
        "*://*.zulily.com/*",
        "*://*.primenow.amazon.co.uk/*",
        "*://*.primenow.amazon.com/*",
        "*://*.smile.amazon.co.uk/*",
        "*://*.smile.amazon.com/*",
        "*://*.expedia.co.uk/*",
        "*://*.amazon.de/*",
        "*://*.dm.de/*",
        "*://*.douglas.de/*",
        "*://*.ebay.de/*",
        "*://*.flaconi.de/*",
        "*://*.galeria.de/*",
        "*://*.rossmann.de/*",
        "*://*.shein.com/*",
        "*://*.zalando.de/*",
        "*://*.asos.de/*",
        "*://*.beautybay.com/*",
        "*://*.kosmetik4less.de/*",
        "*://*.lookfantastic.de/*",
        "*://*.makeupstore.de/*",
        "*://*.otto.de/*",
        "*://*.sephora.de/*",
        "*://*.lazada.com.ph/*",
        "*://*.zooplus.com/*",
        "*://*.zooplus.it/*",
        "*://*.zooplus.co.uk/*",
        "*://*.leclerc.fr/*",
        "*://*.lidl.co.uk/*",
        "*://*.coop.co.uk/*",
        "*://*.leclerc/*",
        "*://*.iceland.co.uk/*",
        "*://*.marksandspencer.com/*",
        "*://*.lazada.co.th/*",
        "*://*.7eleven.co.th/*",
        "*://*.food.grab.com/*",
        "*://*.shopee.co.th/*",
        "*://*.shoponline.tescolotus.com/*",
        "*://*.bigc.co.th/*",
        "*://*.johnlewis.com/*",
        "*://*.houseoffraser.co.uk/*",
        "*://*.littlewoods.com/*",
        "*://*.gumtree.com/*",
        "*://*.hellofresh.com/*",
        "*://*.gousto.co.uk/*",
        "*://*.oddbox.co.uk/*",
        "*://*.missguided.eu/*",
        "*://*.oasisfashion.com/*",
        "*://*.nastygal.com/*",
        "*://*.lookfantastic.com/*",
        "*://*.mugler.com/*",
        "*://*.fragrancedirect.co.uk/*",
        "*://*.allbeauty.com/*",
        "*://*.glossybox.com/*",
        "*://*.glossybox.co.uk/*",
        "*://*.choicefurnituresuperstore.co.uk/*",
        "*://*.bedeckhome.com/*",
        "*://*.diy.com/*",
        "*://*.gettingpersonal.co.uk/*",
        "*://*.shopdisney.com/*",
        "*://*.bunches.co.uk/*",
        "*://*.fortnumandmason.com/*",
        "*://*.prezzybox.com/*",
        "*://*.shopdisney.co.uk/*",
        "*://*.lotuss.com/*",
        "*://*.facebook.com/*",
        "*://*.myntra.com/*",
        "*://*.flipkart.com/*",
        "*://*.youtube.com/*",
        "*://*.instagram.com/*",
        "*://*.reddit.com/*",
        "*://*.x.com/*",
        "*://*.tiktok.com/*",
        "*://*.ubereats.com/*",
        "*://*.glovoapp.com/*",
        "*://*.ah.nl/*",
        "*://*.bol.com/*",
        "*://*.carrefour.fr/*",
        "*://*.carrefour.es/*"
      ],
      "js": [
        "/shopping/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{247ce564-7f60-4719-95e6-ae538bc154eb}"
    }
  },
  "manifest_version": 3,
  "permissions": [
    "history",
    "storage",
    "tabs",
    "alarms",
    "bookmarks",
    "notifications",
    "activeTab",
    "scripting",
    "idle"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "via.html",
        "icon48.png",
        "img/*",
        "overlay/*.css",
        "*.js",
        "styles/*.css",
        "_locales/*",
        "_locales/*/messages.json"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "description": "Rewarding you for being You!"
}