Definition
Plain language
A browser-automation service built to look like an ordinary human visitor so websites don't block it as a bot.
As stated in the literature
A browser-automation backend engineered to evade bot detection — solving CAPTCHAs, mimicking human fingerprints, keeping sessions stable; web-agent evaluations that rely on one can mask the agent's true robustness against a hostile open web, since environment-caused failures get papered over.
Also called: stealth browsers
Why it matters: It can let agents reach sites that fight bots, but leaning on it during testing can hide how well an agent really copes with the obstacles of the open web.
For example, an agent uses one to solve CAPTCHAs and mimic a human's clicking patterns so a shopping site treats it as a real customer instead of blocking it.
Heard on the show
“Second — and this one's the sharpest — the "official" success rates lean on a paid, third-party stealth browser service.”Episode 111 — How a 4B Web Agent Beat Models 60x Its Size on 500 Demonstrations