Userscripts are available in most browsers:
- Opera: Natively supported.
- Firefox: Support via the Greasemonkey and Scriptish add-on.
- Google Chrome: Natively supported (Greasemonkey script are supported by the Tampermonkey extension).
- Internet Explorer: Support via Trixie extension.
- Safari 4-: Supported after installing SIMBL and GreaseKit.
- Safari 5+: Supported via NinjaKit (Japanese site, download link in English).