Examine source code of PickColor - Color Picker

{
  "manifest_version": 3,
  "name": "PickColor - Color Picker",
  "short_name": "PickColor",
  "version": "2.4.1",
  "description": "Lightning-fast color picker and eyedropper. Grab HEX, RGB, and HSL from any webpage for frontend work.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "PickColor Color Picker",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b28f0c22-9d9c-4e6a-9a0c-8f77bda9c6d2}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  }
}