Firefox DevTools MCP 0.10.5 released

Firefox Tooling Announcements
1

New release of Firefox DevTools MCP. Available on npm at https://www.npmjs.com/package/@mozilla/firefox-devtools-mcp

Fixed

  • set_firefox_prefs and get_firefox_prefs work again. They now use WebDriver BiDi to run in the privileged context
  • list_pages no longer fails when the URL or title of a tab cannot be read. That tab is listed with (unknown) values instead

Changed

  • take_snapshot and the UID-based input tools now use WebDriver BiDi instead of WebDriver Classic
  • The snapshot script now runs in a sandbox, so page scripts cannot interfere with it and it does not add globals to the page
  • The Cursor plugin manifest is replaced by the root plugin.json and mcp.json files from the Agent Plugins 1.0 standard, which cursor.directory reads

Full changelog: Release v0.10.5 · mozilla/firefox-devtools-mcp · GitHub
Repository and issues: GitHub - mozilla/firefox-devtools-mcp: Model Context Protocol server for Firefox DevTools - enables AI assistants to inspect and control Firefox browser through WebDriver BiDi · GitHub
Public chatroom: https://chat.mozilla.org/#/room/#firefox-devtools-mcp:mozilla.org