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Mozilla Automation Teamjdescottes1 min readrelease notesintermediate

Firefox DevTools MCP 0.10.3 released

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Summary

Firefox DevTools MCP 0.10.3 is released, introducing a new `close_firefox_session` tool, full-page screenshot capability, and configurable download folders. This update also includes bug fixes and clarifies the usage of `restart_firefox` for controlling Firefox via WebDriver BiDi.

  • A new `close_firefox_session` tool is available to end browser sessions, either releasing connections or closing the browser.
  • The `screenshot_page` tool now supports a `fullPage` parameter to capture the entire scrollable document.
  • `set_download_behavior` can now specify a `downloadFolder` for storing downloads.
  • Fixed an issue where the Firefox binary was not found on Linux with Flatpak.

Engineers building automation or AI assistants that interact with Firefox via WebDriver BiDi will find these new controls and stability improvements useful for their testing and control workflows.

5/10
automationtestingfirefoxdevtoolswebdriver

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