Examine source code of Master Tools

{
  "manifest_version": 3,
  "name": "Master Tools",
  "description": "Enhance your Brainly moderation experience with extra tools and features.",
  "version": "1.2.25",
  "version_name": "1.2.25",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "48": "assets/icons/icon48.png",
      "128": "assets/icons/icon128.png"
    }
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "48": "assets/icons/icon48.png",
    "64": "assets/icons/icon64.png",
    "128": "assets/icons/icon128.png",
    "256": "assets/icons/icon256.png",
    "512": "assets/icons/icon256.png"
  },
  "content_scripts": [
    {
      "world": "MAIN",
      "matches": [
        "*://eodev.com/*",
        "*://znanija.com/*",
        "*://nosdevoirs.fr/*",
        "*://brainly.pl/*",
        "*://brainly.in/*",
        "*://brainly.ph/*",
        "*://brainly.ro/*",
        "*://brainly.com/*",
        "*://brainly.lat/*",
        "*://brainly.co.id/*",
        "*://brainly.com.br/*"
      ],
      "js": [
        "js/scriptWorld.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "*://eodev.com/*",
        "*://znanija.com/*",
        "*://nosdevoirs.fr/*",
        "*://brainly.pl/*",
        "*://brainly.in/*",
        "*://brainly.ph/*",
        "*://brainly.ro/*",
        "*://brainly.com/*",
        "*://brainly.lat/*",
        "*://brainly.co.id/*",
        "*://brainly.com.br/*"
      ],
      "js": [
        "js/vendor.js",
        "js/content_script.js",
        "js/icons.js"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/icons/*.png",
        "brainlyConfigs/*.json",
        "languages/*.json",
        "assets/svg/*.svg",
        "assets/css/brainly.css",
        "assets/css/extension.css",
        "js/icons.js"
      ],
      "matches": [
        "*://eodev.com/*",
        "*://znanija.com/*",
        "*://nosdevoirs.fr/*",
        "*://brainly.pl/*",
        "*://brainly.in/*",
        "*://brainly.ph/*",
        "*://brainly.ro/*",
        "*://brainly.com/*",
        "*://brainly.lat/*",
        "*://brainly.co.id/*",
        "*://brainly.com.br/*"
      ]
    }
  ],
  "background": {
    "service_worker": "js/background.js",
    "scripts": [
      "js/background.js"
    ]
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://brainly-trustandsafety.zendesk.com/*",
    "https://brainly-tools-api.onrender.com/*",
    "*://eodev.com/*",
    "*://znanija.com/*",
    "*://nosdevoirs.fr/*",
    "*://brainly.pl/*",
    "*://brainly.in/*",
    "*://brainly.ph/*",
    "*://brainly.ro/*",
    "*://brainly.com/*",
    "*://brainly.lat/*",
    "*://brainly.co.id/*",
    "*://brainly.com.br/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mastertools@welling.com"
    }
  }
}