Examine source code of Terry Impact Reminder

{
  "manifest_version": 3,
  "name": "Terry Impact Reminder",
  "description": "Doneer gratis aan goede doelen terwijl je online shopt. Terry regelt het automatisch.",
  "version": "2.1.8",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e5697669-798c-4fdf-976d-15797374020c}",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "https://api.terry.earth/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Terry - Shop & Doneer",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/default/icon16.png",
      "48": "icons/default/icon48.png",
      "128": "icons/default/icon128.png"
    }
  },
  "content_scripts": [
    {
      "js": [
        "social-login-handler.js"
      ],
      "matches": [
        "https://api.terry.earth/*"
      ],
      "run_at": "document_idle"
    },
    {
      "js": [
        "search-enhancer.js"
      ],
      "matches": [
        "*://www.google.com/search*",
        "*://www.google.nl/search*",
        "*://www.google.be/search*",
        "*://www.google.de/search*",
        "*://www.google.fr/search*",
        "*://www.google.co.uk/search*",
        "*://www.google.es/search*",
        "*://www.google.it/search*",
        "*://www.bing.com/search*",
        "*://www.ecosia.org/search*",
        "*://duckduckgo.com/*"
      ],
      "run_at": "document_idle"
    },
    {
      "js": [
        "retailer.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "exclude_globs": [
        "*://mail.*/*",
        "*://*.google.*/*",
        "*://*.youtube.*/*",
        "*://terry.earth/*"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*",
        "images/*",
        "stores.html",
        "stores-page.js",
        "stores-page.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "icons/default/icon16.png",
    "48": "icons/default/icon48.png",
    "128": "icons/default/icon128.png"
  }
}