Examine source code of Arbela

{
  "author": "Arbela",
  "background": {
    "page": "background/background.html"
  },
  "browser_action": {
    "default_icon": {
      "50": "ui/images/50.png"
    },
    "default_popup": "ui/mainPanel.html",
    "default_title": "Arbela"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "arbelaplugin@clikpakgroup.com",
      "strict_min_version": "60.0"
    }
  },
  "content_scripts": [
    {
      "all_frames": false,
      "css": [
        "ui/main.css"
      ],
      "js": [
        "lib/jquery-3.3.1.min.js",
        "lib/jquery.validate.min.js",
        "lib/jquery.i18n.js",
        "ui/content-script.js",
        "core/BackgroundPageHelper.js",
        "core/storage-utils.js",
        "core/models.js",
        "core/template.js",
        "core/pikygo-card.js",
        "core/pikygo-api.js",
        "ui/settings.js"
      ],
      "matches": [
        "*://*.amazon.com/*",
        "*://*.aliexpress.com/*",
        "*://*.ebay.com/*",
        "*://*.shein.com/*",
        "*://*.yesstyle.com/*",
        "*://*.walmart.com/*",
        "*://*.ikea.com/*",
        "*://*.sallybeauty.com/*",
        "*://*.6pm.com/*",
        "*://*.macys.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self' https://www.arbela.store/;",
  "description": "Shop Now from US Online Stores and have an express Door to Door Delivery",
  "icons": {
    "16": "ui/images/16.png",
    "30": "ui/images/30.png",
    "32": "ui/images/30.png",
    "48": "ui/images/48.png",
    "50": "ui/images/50.png",
    "120": "ui/images/120.png",
    "128": "ui/images/128.png"
  },
  "manifest_version": 2,
  "name": "Arbela",
  "permissions": [
    "storage",
    "*://*.amazon.com/*",
    "*://*.arbela.store/*",
    "*://*.aliexpress.com/*",
    "*://*.ebay.com/*",
    "*://*.shein.com/*",
    "*://*.yesstyle.com/*",
    "*://*.walmart.com/*",
    "*://*.ikea.com/*",
    "*://*.sallybeauty.com/*",
    "*://*.6pm.com/*",
    "*://*.macys.com/*",
    "tabs"
  ],
  "short_name": "Arbelaplugin",
  "version": "1.5.1",
  "web_accessible_resources": [
    "ui/fonts/*.woff",
    "ui/images/*.png",
    "ui/images/*.gif",
    "ui/basket.html",
    "ui/guide.html",
    "ui/header-panel.html",
    "/locales.ini"
  ]
}