Examine source code of ColorPicker

{
  "manifest_version": 3,
  "name": "ColorPicker",
  "version": "1.0.0",
  "description": "Simple color picker tool. Pick colors, convert between HEX/RGB/HSL, and save your palette.",
  "icons": {
    "48": "imgs/icon-48.png",
    "96": "imgs/icon-96.png",
    "128": "imgs/icon-128.png"
  },
  "action": {
    "default_icon": {
      "48": "imgs/icon-48.png",
      "96": "imgs/icon-96.png"
    },
    "default_title": "ColorPicker",
    "default_popup": "ui/picker.html"
  },
  "permissions": [
    "storage",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "colorpicker@design.simple",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}