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Claude

Version 1.0.36 View in Chrome Web Store

Last scanned: 1 day ago | force re-scan

Extension Details

Developer: Anthropic

Rating: 2.9 ★ (230 ratings)

Users: 500,000

Context-Aware Verdict

CRITICAL

Overall Risk

Trust Factors:

The extension is developed by Anthropic, a reputable AI company known for Claude AI assistant, which adds credibility. However, the relatively low rating of 2.9 out of 5 stars from 230 reviews is concerning and suggests user dissatisfaction or potential issues. The substantial user base of 500,000 indicates widespread adoption, but the poor rating undermines confidence in the extension's quality or user experience.

Concerns:

The extension requests an excessive number of high-risk permissions that seem disproportionate for an AI assistant tool. The debugger permission is particularly alarming as it allows manipulation of other extensions and browser debugging capabilities. The combination of broad host permissions with content script injection across all websites creates significant privacy and security risks. The tabs and webNavigation permissions enable comprehensive browsing activity monitoring, while the downloads permission could facilitate unauthorized file access. The nativeMessaging capability allows communication with external applications, expanding the attack surface.

Recommendations:

Given the critical risk level, avoid installing this extension on your primary browser profile. If you must use it, create a dedicated Chrome profile with minimal sensitive data and browsing activity. Consider using the official Claude web interface at claude.ai instead of this extension. Monitor your browser's performance and security closely if installed, and regularly review what data the extension might be accessing through Chrome's extension management settings.

Findings

HIGH

Broad Content Script Injection

This extension can inject scripts into any website. This means it could potentially read sensitive data, modify website content, or steal credentials.

HIGH

Broad Host Permissions

This extension has broad host permissions allowing it to access many or all websites. This could potentially be used to steal sensitive data or track browsing activity.

HIGH

High-Risk Permission: debugger

This extension has the debugger permission. Can debug and manipulate other extensions/apps. This could potentially be used maliciously to compromise security or privacy.

HIGH

High-Risk Permission: downloads

This extension has the downloads permission. Can download files and access download history. This could potentially be used maliciously to compromise security or privacy.

HIGH

High-Risk Permission: tabs

This extension has the tabs permission. Can access browser tab information and manipulate tabs. This could potentially be used maliciously to compromise security or privacy.

HIGH

High-Risk Permission: webNavigation

This extension has the webNavigation permission. Can track your web navigation. This could potentially be used maliciously to compromise security or privacy.

MEDIUM

Medium-Risk Permission: activeTab

This extension has the activeTab permission. Can access the active tab when clicking the extension icon.

MEDIUM

Medium-Risk Permission: notifications

This extension has the notifications permission. Can show notifications.

MEDIUM

Medium-Risk Permission: storage

This extension has the storage permission. Can store data locally.

MEDIUM

Medium-Risk Permission: unlimitedStorage

This extension has the unlimitedStorage permission. Can store unlimited data locally.

Security Analysis Details

Required Permissions:

sidePanel
storage
activeTab
scripting
debugger
tabGroups
tabs
alarms
notifications
system.display
webNavigation
declarativeNetRequestWithHostAccess
offscreen
nativeMessaging
unlimitedStorage
downloads

Host Permissions:

<all_urls>

Content Security Policy:

extension_pages: script-src 'self'; object-src 'self'; connect-src 'self' https://api.anthropic.com wss://api.anthropic.com https://claude.ai https://console.anthropic.com https://statsig.com https://*.statsig.com https://api.statsig.com https://featuregates.org https://statsigapi.net https://events.statsigapi.net https://api.statsigcdn.com https://featureassets.org https://assetsconfigcdn.org https://prodregistryv2.org https://cloudflare-dns.com https://beyondwickedmapping.org https://api.segment.io https://*.segment.com https://*.ingest.us.sentry.io https://api.honeycomb.io; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:;

Embedded URLs (127 total):

https://github.com/jnordberg/gif.js	http://www.w3.org/2000/svg
https://clients2.google.com/service/update2/crx	https://claude.ai/
https://api.anthropic.com	https://claude.ai
https://console.anthropic.com	https://statsig.com
https://api.statsig.com	https://featuregates.org
https://statsigapi.net	https://events.statsigapi.net
https://api.statsigcdn.com	https://featureassets.org
https://assetsconfigcdn.org	https://prodregistryv2.org
https://cloudflare-dns.com	https://beyondwickedmapping.org
https://api.segment.io	https://api.honeycomb.io
https://example.comSSSSSSSSSSSSSSSSSSSSSSSSS	https://example.com
https://github.com/syntax-tree/hast-util-to-jsx-runtime	https://github.com/uuidjs/uuid#getrandomvalues-not-supported
https://nextjs.org/docs/messages/invalid-images-config	https://nextjs.org/docs/messages/next-image-missing-loader
https://slack.mcp.ant.dev/sse	https://mcp-server-gcal-586545259222.us-central1.run.app/sse
https://mcp-server-gcal-586545259222.us-central1.run.app/mcp	https://gcal.mcp.claude.com/mcp
https://gcal.mcp.staging.ant.dev/mcp	https://mcp-server-gmail-110131437935.us-central1.run.app/sse
https://mcp-server-gmail-110131437935.us-central1.run.app/mcp	https://gmail.mcp.claude.com/mcp
https://gmail.mcp.staging.ant.dev/mcp	https://api.anthropic.com/mcp/gdrive/sse
https://api.anthropic.com/mcp/gdrive/mcp	https://mcp-server-gdrive-532483229523.us-central1.run.app/sse
https://microsoft365.mcp.claude.com/mcp	https://www.microsoft.com/microsoft-365
https://www.google.com/s2/favicons	https://www.gstatic.com
https://t0.gstatic.com	https://gmail.mcp.claude.com/sse
https://gmail.mcp.staging.ant.dev/sse	https://gdrive.mcp.claude.com/mcp
https://gdrive.mcp.claude.com/sse	https://gcal.mcp.claude.com/sse
https://gcal.mcp.staging.ant.dev/sse	https://slack.mcp.ant.dev/mcp
https://microsoft365.mcp.claude.com/sse	https://www.google.com/s2/favicons?domain=
https://claude.ai/settings/integrations	https://feross.org/opensource
https://github.com/indutny/elliptic/issues	https://github.com/indutny/elliptic
https://github.com/browserify/crypto-browserify	https://raw.githubusercontent.com/ajv-validator/ajv/master/lib/refs/data.json#
http://json-schema.org/draft-07/schema#	https://github.com/ajv-validator/ajv/blob/master/lib/definition_schema.js
http://json-schema.org/draft-07/schema	http://json-schema.org/schema
https://react.dev/errors/	http://www.w3.org/1998/Math/MathML
http://www.w3.org/1999/xlink	http://www.w3.org/XML/1998/namespace
https://formatjs.github.io/docs/tooling/babel-plugin	https://formatjs.github.io/docs/tooling/ts-transformer
https://formatjs.github.io/docs/tooling/linter#enforce-id	https://formatjs.github.io/docs/getting-started/message-distribution
https://formatjs.github.io/docs/react-intl#runtime-requirements	https://formatjs.github.io/docs/react-intl/api#intlshape
https://prodregistryv2.org/v1	https://featureassets.org/v1
https://api.statsigcdn.com/v1	https://statsigapi.net/v1/sdk_exception
https://cloudflare-dns.com/dns-query	https://docs.statsig.com/client/javascript-sdk/#typed-getters
https://radix-ui.com/primitives/docs/components/	https://nextjs.org/docs/messages/public-next-folder-conflict

Page 1 of 2

Raw Manifest

{
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjU1XnLPoasGVmZU42K3h6S+sQhkogfcoLPbIcrWH5Oo8QoInBIugkew/7cWaEFySyQrkaEBe1fjeS/rlAqd3r778dKcTvDZcXmj0VVX0Fi1i8tnkarurceGKGdVxfkL7e30nwfgwoPxj3H8OQbsbxFcBWGVtcFekmdpiyaxwz6o4yXIWColfAxh9K2yToOZkoAS5GvgGvTexiCh1gYy++eFdk6C61mcFsyDdoGQtduhGEaX0zZ9uAW1jX4JTPmHV3kEFrZu/WVBl7Obw+Jk/osoHMdmghVNy6SCB8/6mcgmxkP9buPrNUZgYP6n0x5dqEJ2Ecww/lb1Zd4nQf4XGOwIDAQAB",
  "name": "Claude",
  "icons": {
    "128": "icon-128.png"
  },
  "action": {
    "default_title": "Open Claude"
  },
  "version": "1.0.36",
  "commands": {
    "toggle-side-panel": {
      "description": "Toggle Claude side panel",
      "suggested_key": {
        "mac": "Command+E",
        "default": "Ctrl+E"
      }
    }
  },
  "background": {
    "type": "module",
    "service_worker": "service-worker-loader.js"
  },
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "Claude for Chrome (Beta)",
  "permissions": [
    "sidePanel",
    "storage",
    "activeTab",
    "scripting",
    "debugger",
    "tabGroups",
    "tabs",
    "alarms",
    "notifications",
    "system.display",
    "webNavigation",
    "declarativeNetRequestWithHostAccess",
    "offscreen",
    "nativeMessaging",
    "unlimitedStorage",
    "downloads"
  ],
  "options_page": "options.html",
  "content_scripts": [
    {
      "js": [
        "assets/content-script.ts-Bwa5rY9t.js"
      ],
      "run_at": "document_end",
      "matches": [
        "https://claude.ai/*",
        "https://*.claude.ai/*"
      ]
    },
    {
      "js": [
        "assets/accessibility-tree.js-D39zjmMD.js"
      ],
      "run_at": "document_start",
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true
    },
    {
      "js": [
        "assets/agent-visual-indicator.js-Ct7LqXhp.js"
      ],
      "run_at": "document_idle",
      "matches": [
        "<all_urls>"
      ],
      "all_frames": false
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "manifest_version": 3,
  "externally_connectable": {
    "matches": [
      "https://claude.ai/*",
      "https://*.claude.ai/*"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; connect-src 'self' https://api.anthropic.com wss://api.anthropic.com https://claude.ai https://console.anthropic.com https://statsig.com https://*.statsig.com https://api.statsig.com https://featuregates.org https://statsigapi.net https://events.statsigapi.net https://api.statsigcdn.com https://featureassets.org https://assetsconfigcdn.org https://prodregistryv2.org https://cloudflare-dns.com https://beyondwickedmapping.org https://api.segment.io https://*.segment.com https://*.ingest.us.sentry.io https://api.honeycomb.io; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:;"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "https://*.claude.ai/*",
        "https://claude.ai/*"
      ],
      "resources": [
        "assets/content-script.ts-Bwa5rY9t.js"
      ],
      "use_dynamic_url": false
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "assets/accessibility-tree.js-D39zjmMD.js",
        "assets/agent-visual-indicator.js-Ct7LqXhp.js"
      ],
      "use_dynamic_url": false
    }
  ]
}

by ✦ Astarte

Claude

Extension Details

Context-Aware Verdict

Findings

Security Analysis Details

Required Permissions:

Host Permissions:

Content Security Policy:

Embedded URLs (127 total):

Raw Manifest

Detections

Manifest Findings