Examine source code of Search All Tabs (Simple but Fast)

{
  "manifest_version": 3,
  "name": "Search All Tabs (Simple but Fast)",
  "version": "0.0.4",
  "description": "Search the title and body content of all open tabs for specific text.",
  "author": "ericchase",
  "permissions": [
    "contextMenus",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon-dark-16.png",
      "32": "icons/icon-dark-32.png",
      "48": "icons/icon-dark-48.png",
      "128": "icons/icon-dark-128.png"
    },
    "theme_icons": [
      {
        "dark": "icons/icon-dark-16.png",
        "light": "icons/icon-light-16.png",
        "size": 16
      },
      {
        "dark": "icons/icon-dark-32.png",
        "light": "icons/icon-light-32.png",
        "size": 32
      },
      {
        "dark": "icons/icon-dark-48.png",
        "light": "icons/icon-light-48.png",
        "size": 48
      },
      {
        "dark": "icons/icon-dark-128.png",
        "light": "icons/icon-light-128.png",
        "size": 128
      }
    ]
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "service-worker.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "120.0",
      "id": "{e1818644-efe3-403e-a6bf-b913f9e16918}"
    }
  }
}