Examine source code of XSSassin - Payload Injector

{
  "manifest_version": 3,
  "name": "XSSassin - Web Security Payload Injector",
  "version": "1.3.2",
  "description": "Security testing: inject payloads into input fields. XSS, SQLi, HTML injection and more.",
  "browser_specific_settings": {
    "gecko": {
      "id": "xssassin@extension.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      },
      "strict_min_version": "140.0"
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "XSSassin"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "ext-api.js",
        "payloads.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ]
}