Examine source code of Caramel (Open Beta)

{
  "manifest_version": 3,
  "name": "Caramel",
  "version": "1.0.3",
  "description": "Caramel is your trusted, open-source companion for saving on online purchases. No scams, just sweet deals!",
  "browser_specific_settings": {
    "gecko": {
      "id": "caramel@devino.ca"
    }
  },
  "icons": {
    "16": "/icons/16.png",
    "19": "/icons/19.png",
    "32": "/icons/32.png",
    "38": "/icons/38.png",
    "192": "/icons/192.png",
    "512": "/icons/512.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "scripting",
    "alarms"
  ],
  "host_permissions": [
    "https://www.amazon.com/*",
    "https://*.ebay.com/*",
    "https://*.codecademy.com/*",
    "https://*.grabcaramel.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "index.html",
        "supported.json",
        "assets/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.com/*",
        "https://*.ebay.com/*",
        "https://*.codecademy.com/*"
      ],
      "js": [
        "shared-utils.js",
        "UI-helpers.js",
        "inject.js",
        "amazon.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "/icons/16.png",
      "19": "/icons/19.png",
      "32": "/icons/32.png",
      "38": "/icons/38.png",
      "192": "/icons/192.png",
      "512": "/icons/512.png"
    }
  }
}