Examine source code of Color Picker

{
  "manifest_version": 3,
  "name": "Color Picker Pro",
  "version": "2.0",
  "description": "A versatile color picker tool with multiple formats, history, and color palettes.",
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon32.png",
      "128": "icons/icon128.png"
    }
  },
  "permissions": [
    "clipboardWrite",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "colorpicker@mysteriousimmature.com",
      "strict_min_version": "58.0"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon32.png",
    "128": "icons/icon128.png"
  }
}