Browserbase uses direct WebSocket connections (wss://) rather than the
standard HTTP-based /json/version CDP discovery flow used by Browserless.
This change teaches the browser tool to accept ws:// and wss:// URLs as
cdpUrl values: when a WebSocket URL is detected, OpenClaw connects
directly instead of attempting HTTP discovery.
Changes:
- config.ts: accept ws:// and wss:// in cdpUrl validation
- cdp.helpers.ts: add isWebSocketUrl() helper
- cdp.ts: skip /json/version when cdpUrl is already a WebSocket URL
- chrome.ts: probe WSS endpoints via WebSocket handshake instead of HTTP
- cdp.test.ts: add test for direct WebSocket target creation
- docs/tools/browser.md: update Browserbase section with correct URL
format and notes
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When HTTP_PROXY / HTTPS_PROXY / ALL_PROXY environment variables are set,
CDP connections to localhost/127.0.0.1 can be incorrectly routed through
the proxy (e.g. via global-agent or undici proxy dispatcher), causing
browser control to fail.
Fix:
- New cdp-proxy-bypass module with utilities for direct localhost connections
- WebSocket (ws) CDP connections: pass explicit http.Agent to bypass any
global proxy agent patching
- fetch-based CDP probes: wrap in withNoProxyForLocalhost() to temporarily
set NO_PROXY for the duration of the call
- Playwright connectOverCDP: wrap in withNoProxyForLocalhost() since
Playwright reads env vars internally
- 13 new tests covering getDirectAgentForCdp, hasProxyEnv, and
withNoProxyForLocalhost (env save/restore, error recovery)
* fix(browser): include Chrome stderr and sandbox hint in CDP startup error (#29312)
When Chrome fails to start and CDP times out, the error message previously
contained no diagnostic information, making it impossible to determine why
Chrome couldn't start (e.g. missing --no-sandbox in containers, GPU issues,
shared memory errors).
This change:
- Collects Chrome's stderr output and includes up to 2000 chars in the error
- On Linux, if noSandbox is not set, appends a hint to try browser.noSandbox: true
Closes#29312
* chore(browser): format chrome startup diagnostics
* fix(browser): detach stderr listener after Chrome starts to prevent memory leak
Named the anonymous listener so it can be removed via proc.stderr.off()
once CDP is confirmed reachable. Also clears the stderrChunks array on
success so the buffered data is eligible for GC.
Fixes the unbounded memory growth reported in code review: a long-lived
Chrome process emitting periodic warnings would keep appending to
stderrChunks indefinitely since the listener was never removed.
Addresses review comment from chatgpt-codex-connector on PR #29355.
* changelog: note cdp startup diagnostics improvement
---------
Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
Co-authored-by: 派尼尔 <painier@openclaw.ai>
Add the missing extraArgs property to buildSandboxBrowserResolvedConfig
to satisfy the ResolvedBrowserConfig type, and fix import ordering.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds a `browser.extraArgs` config option (string array) that is appended
to Chrome's launch arguments. This enables users to add stealth flags,
window size overrides, custom user-agent strings, or other Chrome flags
without patching the source code.
Example config:
browser.extraArgs: ["--window-size=1920,1080", "--disable-infobars"]
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
