Examine source code of recrun

{
  "action": {
    "default_icon": "icons/icon38.png"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ae016343-4621-41f9-824f-efbe9afa931d}"
    }
  },
  "description": "Retain essential content, remove unwanted noise.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "manifest_version": 3,
  "name": "recrun",
  "options_ui": {
    "page": "src/options.html"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "version": "3.5.0",
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "src/loader.gif",
        "src/style.css",
        "src/options.html",
        "src/iframe.html",
        "src/content.html"
      ]
    }
  ]
}