Examine source code of WebGrenade

{
  "manifest_version": 3,
  "name": "Web Grenade",
  "version": "4.2.0",
  "description": "The ultimate webmaster utility suite. Dark mode, volume booster, popup blocker, media grabber, video sniffer, and 15+ pro modules.",
  "author": "MacallanTheRoot",
  "action": {
    "default_popup": "popup.html",
    "default_title": "WebGrenade",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "notifications",
    "contextMenus",
    "cookies",
    "webNavigation",
    "history",
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "WebBomb@macallan.dev",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "inject.js",
        "volume-inject.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}