Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Browser Tools Mcp

Monitor browser logs directly from Cursor and other MCP compatible IDEs.

Compatibility: Portable across standard formats.

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 349129ed6f87.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    browser-tools-mcp/src/connector/connector.ts, line 766 fs.rmSync(path.join(auditDir, stale.name), { force: true });

  • NETWORK_NO_FIXED_HOST Low

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

    browser-tools-mcp/src/runtime.ts, line 96 const response = await fetch(new URL("/.identity", baseUrl), {

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

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    browser-tools-mcp/src/connector/connector.ts, line 766

    fs.rmSync(path.join(auditDir, stale.name), { force: true });

    browser-tools-mcp/src/util/session.ts, line 62

    fs.rmSync(sessionFilePath(), { force: true });

  • 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

    browser-tools-mcp/src/runtime.ts, line 96

    const response = await fetch(new URL("/.identity", baseUrl), {

    browser-tools-mcp/src/lighthouse/egress-proxy.ts, line 154

    const socket = net.connect({ host: address, port });

    browser-tools-mcp/src/lighthouse/egress-proxy.ts, line 307

    upstream = http.request(

    Show more

    browser-tools-mcp/src/mcp/client.ts, line 213

    const response = await this.#fetch(url, {

    chrome-extension/devtools.js, line 81

    ws = new WebSocket(`ws://${found.host}:${found.port}/extension-ws`);

    chrome-extension/shared.js, line 65

    const response = await fetch(`http://${host}:${port}/.identity`, {

  • Secrets

    Pass

    No read of a credential file or secret environment variable found.

  • Agent instructions

    Pass

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

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • Licence

    Pass

    A licence file is present (LICENSE).

  • 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 349129ed6f87. can delete files. can reach a host that is not written as a fixed address.

Date and source

Date checked:

View source

github.com

Commit graded: 349129ed6f87abff8f3154cc11dfb13b4e869cce

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