Ferrum

On the record

Browser automation

Ferrum supports page navigation, CSS and XPath element finding, and mouse and keyboard input.docs.rubycdp.com · read 5 Oct 2026

Browser modes

Ferrum runs headless by default and can be configured to run with a visible browser window.github.com · read 11 Oct 2026

Browser protocol

Ferrum connects to Chrome through the Chrome DevTools Protocol and does not depend on Selenium, WebDriver, or ChromeDriver.github.com · read 11 Oct 2026

Features

The project website lists navigation and finders, screenshots, mouse and keyboard control, network, cookies, headers, JavaScript, frames, and dialogs.ferrum.rubycdp.com · read 11 Oct 2026

Integrations

Cuprite is a Capybara driver built on Ferrum, and Vessel is a web crawling framework based on Ferrum and Mechanize.github.com · read 11 Oct 2026

JavaScript

The documentation provides methods to evaluate JavaScript expressions and execute JavaScript in a page.docs.rubycdp.com · read 5 Oct 2026

License

Ferrum is available as open-source software under the MIT License.github.com · read 11 Oct 2026

Linux browser setup

The documentation advises downloading Chrome or Chromium from its official source because it says there is no official Chrome or Chromium package for Linux.docs.rubycdp.com · read 5 Oct 2026

Page capture

Its capture methods can save or return screenshots, PDFs, and MHTML.docs.rubycdp.com · read 5 Oct 2026

Protocol

It connects to Chrome through the Chrome DevTools Protocol without a Selenium, WebDriver, or ChromeDriver dependency.docs.rubycdp.com · read 5 Oct 2026

Proxy support

Ferrum accepts proxy settings for a browser or for pages created in separate contexts.docs.rubycdp.com · read 5 Oct 2026

Purpose

Ferrum provides a high-level Ruby API to control Chrome and automate browser tasks.ferrum.rubycdp.com · read 11 Oct 2026

Requirements

Ferrum requires Ruby and Chrome or Chromium; the browser binary must be available on PATH or specified with BROWSER_PATH.github.com · read 11 Oct 2026

Ruby version

The published gem requires Ruby version 3.1 or later.rubygems.org · read 11 Oct 2026

Support

The project welcomes bug reports and pull requests on GitHub.github.com · read 11 Oct 2026

Thread safety

The project website says Ferrum was designed to be thread safe and that each page can be maintained independently through a dedicated websocket.ferrum.rubycdp.com · read 11 Oct 2026

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