Examine source code of Sprinkles

{
  "manifest_version": 3,
  "name": "Sprinkles",
  "description": "The Sprinkles bread and butter",
  "version": "1.4.2",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "action": {
    "default_icon": {
      "16": "images/toolbar-icon-16.png",
      "32": "images/toolbar-icon-32.png"
    },
    "default_title": "Reload user scripts"
  },
  "permissions": [
    "scripting",
    "webNavigation"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "optional_permissions": [
    "userScripts"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "sw.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{588f4ebd-9540-4f57-943d-04c682e96db9}"
    }
  }
}