Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Jev Browser Control

Let Claude or Codex drive a real Chrome.

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.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_ENCODED_BLOB SECRETS_ENV_READ

Why this grade

  • NETWORK_NO_FIXED_HOST Low

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

    extension/lib/bridge.js, line 68 const res = await fetch(`http://127.0.0.1:${this.port}/health`, { signal: AbortSignal.timeout(1500) });

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    scripts/benchmark.mjs, line 14 // CHROME_PATH=... node --env-file=.env scripts/benchmark.mjs [--session] [--models jev,anthropic/claude-sonnet-5] [--tasks wiki,form,hn]

  • OBFUSCATION_ENCODED_BLOB Low

    Contains a long base64 shaped string in a file that should be readable.

    extension/manifest.json, line 9 "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn78KLHdGtIPZQ2887jX/BmNc2r0rnYGm9M104NpAv4n+I3ik4wbBNdml1q4pBOY5aj2i+c+TQjYRMIvkq4r9K5avNSNkNdLTLOAjEH2ZTQtLes2IGrhpxGMNNav1vnHA

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    scripts/benchmark.mjs, line 22 const KEY = process.env.OPENROUTER_API_KEY;

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

    extension/lib/bridge.js, line 68

    const res = await fetch(`http://127.0.0.1:${this.port}/health`, { signal: AbortSignal.timeout(1500) });

    extension/lib/bridge.js, line 76

    const ws = this.endpoint ? new WebSocket(this.endpoint.url, this.endpoint.protocols) : new WebSocket(`ws://127.0.0.1:${this.port}/extension`);

    scripts/benchmark.mjs, line 123

    const res = await fetch('https://openrouter.ai/api/v1/chat/completions', {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    scripts/benchmark.mjs, line 14

    // CHROME_PATH=... node --env-file=.env scripts/benchmark.mjs [--session] [--models jev,anthropic/claude-sonnet-5] [--tasks wiki,form,hn]

    scripts/benchmark.mjs, line 22

    const KEY = process.env.OPENROUTER_API_KEY;

    scripts/record-run.mjs, line 3

    // CHROME_PATH=... node --env-file=.env scripts/record-run.mjs "<goal>" <url> results/run-name.json

    Show more

    scripts/record-run.mjs, line 20

    const settings = process.env.JBC_CLOUD_KEY

    scripts/record-run.mjs, line 21

    ? { provider: 'cloud', cloudKey: process.env.JBC_CLOUD_KEY, cloudBase: process.env.JBC_CLOUD_BASE }

    scripts/record-run.mjs, line 22

    : { provider: 'openrouter', openrouterKey: process.env.OPENROUTER_API_KEY };

    .gitignore, line 2

    dist/

    .gitignore, line 3

    .env

    .gitignore, line 5

    !.env.example

    package.json, line 13

    "e2e": "node --env-file-if-exists=.env test/e2e/run.mjs",

    package.json, line 14

    "e2e:browser": "node --env-file-if-exists=.env test/e2e/browser-mode.mjs",

  • Agent instructions

    Pass

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

  • Obfuscation

    Concern

    contains an encoded blob in a file that should be readable.

    OBFUSCATION_ENCODED_BLOB

    extension/manifest.json, line 9

    "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn78KLHdGtIPZQ2887jX/BmNc2r0rnYGm9M104NpAv4n+I3ik4wbBNdml1q4pBOY5aj2i+c+TQjYRMIvkq4r9K5avNSNkNdLTLOAjEH2ZTQtLes2IGrhpxGMNNav1vnHA

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

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Note

Hygiene check of commit 1c752b8bafe7. can reach a host that is not written as a fixed address. reads a credential or environment file. contains an encoded blob in a file that should be readable.

Date and source

Date checked:

View source

github.com

Commit graded: 1c752b8bafe76e03415c7b1c6a6dba0edfee845b

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