Can the OpenClaw browser run headless

Yes. It’s a config option:
{
browser: { headless: true },
agents: {
defaults: {
sandbox: { browser: { headless: true } },
},
},
}
Default is false (headful). Headless is more likely to trigger anti‑bot checks on some sites. See Browser.
Headless uses the same Chromium engine and works for most automation (forms, clicks, scraping, logins). The main differences:
No visible browser window (use screenshots if you need visuals).
Some sites are stricter about automation in headless mode (CAPTCHAs, anti‑bot). For example, X/Twitter often blocks headless sessions.