Examine source code of Simple Hex Color Picker

{
  "manifest_version": 2,
  "name": "Simple Hex Color Picker",
  "version": "1.0",
  "description": "A simple tool to pick a color by entering a hex color code.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b5bbb75-d069-4c8c-afb7-e3f0f8332c17}"
    }
  }
}