# Firefox DevTools MCP 0.10.5 released

**URL:** <https://discourse.mozilla.org/t/firefox-devtools-mcp-0-10-5-released/149725>\
**Category:** Firefox Tooling Announcements\
**Tags:** developer-tools\
**Created:** [October 9, 2026, 2:03pm UTC](https://discourse.mozilla.org/t/firefox-devtools-mcp-0-10-5-released/149725 "2026-10-09T14:03:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jdescottes](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/jdescottes/32/22185_2.png) [@jdescottes](https://discourse.mozilla.org/u/jdescottes)\
**Post date:** [October 9, 2026, 2:03pm UTC](https://discourse.mozilla.org/t/firefox-devtools-mcp-0-10-5-released/149725/1 "2026-10-09T14:03:21Z")

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New release of Firefox DevTools MCP. Available on npm at [https://www.npmjs.com/package/@mozilla/firefox-devtools-mcp](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](https://github.com/mozilla/firefox-devtools-mcp/releases/tag/v0.10.5)  
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](https://github.com/mozilla/firefox-devtools-mcp)  
Public chatroom: [https://chat.mozilla.org/#/room/#firefox-devtools-mcp:mozilla.org](https://chat.mozilla.org/#/room/#firefox-devtools-mcp:mozilla.org)