@mozilla/firefox-devtools-mcp-moz

What changed

Changed 2026-10-16 11:11 UTC

1 tool added.

+ tool added: print_page

Changed 2026-10-05 14:15 UTC

2 descriptions rewritten, 2 schema or annotation changes with the description left byte-identical, 3 tools added, 1 tool removed.

+ tool added: close_firefox_session

--- pinned/navigate_page
+++ observed/navigate_page
  {
    "annotations": {
      "readOnlyHint": false
+       },
+       "wait": {
+         "description": "When to return: 'none' (navigation started), 'interactive' (DOMContentLoaded), 'complete' (load event fired, including subresources). Omit for the default: 'interactive' for http/https/data/blob/file, 'none' for other schemes. Use 'complete' when the page must be fully loaded, e.g. before stopping a performance recording.",
+         "enum": [
+           "none",
+           "interactive",
+           "complete"
+         ],
+         "type": "string"
        }
      },
      "required": [

--- pinned/new_page
+++ observed/new_page
  {
    "annotations": {
      "readOnlyHint": false
+       },
+       "wait": {
+         "description": "When to return: 'none' (navigation started), 'interactive' (DOMContentLoaded), 'complete' (load event fired, including subresources). Omit for the default: 'interactive' for http/https/data/blob/file, 'none' for other schemes. Use 'complete' when the page must be fully loaded, e.g. before stopping a performance recording.",
+         "enum": [
+           "none",
+           "interactive",
+           "complete"
+         ],
+         "type": "string"
        }
      },
      "required": [

+ tool added: press_key

--- pinned/screenshot_page
+++ observed/screenshot_page
  {
    "annotations": {
      "readOnlyHint": true
-   "description": "Capture page screenshot as base64 PNG.",
+   "description": "Capture viewport screenshot as base64 PNG. Set fullPage for the whole scrollable document.",
    "inputSchema": {
      "properties": {
+       "fullPage": {
+         "description": "Capture the whole scrollable document (default: false)",
+         "type": "boolean"
+       },
        "saveTo": {
          "description": "Save the screenshot to a file instead of returning it as image data in the response. Pass a file path, an existing directory (generated file inside), or true (generated file under ~/.firefox-devtools-mcp/output/). Relative paths resolve against the current working directory.",
          "type": [

--- pinned/set_download_behavior
+++ observed/set_download_behavior
  {
-   "description": "Control how downloads are handled: allow (save silently to the default download directory), deny (cancel), or reset to default. Avoids the native save-file dialog. Requires a recent Firefox.",
+   "description": "Control how downloads are handled: allow (save to a destination folder), deny (cancel), or reset to default. Avoids the native save-file dialog. Requires a recent Firefox.",
    "inputSchema": {
      "properties": {
        "behavior": {
-         "description": "'allowed' saves downloads automatically, 'denied' cancels them, 'default' resets to the browser default",
+         "description": "'allowed' saves downloads to `downloadFolder`, 'denied' cancels them, 'default' resets to the browser default",
          "enum": [
            "allowed",
            "denied",
+       },
+       "downloadFolder": {
+         "description": "Path to the folder where downloads should be stored, created if missing. Only used for behavior='allowed', where it defaults to ~/.firefox-devtools-mcp/output/downloads. Relative paths resolve against the current working directory.",
+         "type": "string"
        }
      },
      "required": [

+ tool added: type_text

tool removed: restart_firefox

Current tools

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