Examine source code of SVG Collector

{
  "manifest_version": 3,
  "name": "SVG Collector",
  "version": "1.0.6",
  "description": "Collect and display SVGs from the current page",
  "permissions": [],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "svg-collector@example.com"
    }
  }
}