Violentmonkey is built with web extension APIs. It supports a lot of browsers.
You can either install it from web stores or build from source code.
Chrome, Firefox 57+, Edge, Chromium, Opera 15+, Vivaldi, QQBrowser, etc.
- Opera users please install from Chrome Web Store because the Opera team no longer reviews the extension because they think Violentmonkey is too complicated and they don't have time to review it. 😞
Maxthon 4 and 5.