Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Firefox Devtools Mcp

Model Context Protocol server for Firefox DevTools - enables AI assistants to inspect and control Firefox browser through WebDriver BiDi

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit ab64abc8e554.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    src/firefox/bidi.ts, line 117 // bidi.socket is a Node.js `ws` WebSocket (EventEmitter-style), but typed as browser WebSocket

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    src/index.moz.ts, line 3 // Load .env file in development mode

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    package-lock.json, line 1 {

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Pass

    No shell or command execution found, and no extra permission was declared.

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    src/firefox/bidi.ts, line 117

    // bidi.socket is a Node.js `ws` WebSocket (EventEmitter-style), but typed as browser WebSocket

    src/utils/js-validation.ts, line 32

    ' async () => { return await fetch("/api") }\n' +

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    src/index.moz.ts, line 3

    // Load .env file in development mode

    src/index.moz.ts, line 9

    console.error('Loaded .env file for development');

    src/index.public.ts, line 3

    // Load .env file in development mode

    Show more

    src/index.public.ts, line 9

    console.error('Loaded .env file for development');

    .gitignore, line 68

    # dotenv environment variable files

    .gitignore, line 69

    .env

    Taskfile.yaml, line 110

    desc: Create .env file from example

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Note

    a file was over the read cap and was not fully read.

    OBFUSCATION_FILE_OVER_READ_CAP

    package-lock.json, line 1

    {

  • Licence

    Note

    no licence file found.

    LICENCE_MISSING

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit ab64abc8e554. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read. no licence file found.

Date and source

Date checked:

View source

github.com

Commit graded: ab64abc8e554f003b52197e4576902ac9bd6dda5

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen