jev-ultrafast vs nanobrowser
Browser Use's speed experiment: Jev picks the operation and the target element from an indexed action space in one request, and a small LLM writes text only when typing is needed. — versus — Chrome extension running a Planner/Navigator multi-agent loop inside the browser you already use, with your own API keys — a free, local alternative to OpenAI Operator.
Both drive a real Chrome toward a natural-language goal; nanobrowser runs a Planner/Navigator LLM loop inside the browser you use, jev-ultrafast replaces that reasoning with typed decisions over an indexed element table.
| jev-ultrafast | nanobrowser | |
|---|---|---|
| Stars | 8.3k | 14k |
| Forks | 518 | 1.5k |
| Language | Python | TypeScript |
| License | MIT | Apache-2.0 |
| Last activity | yesterday | 1 months ago |
| Topics | web, agents | web, agents |
| Curated connections | 4 | 5 |
jev-ultrafast — the curator's take
Read this one for the architecture even if you never run it: the page becomes a numbered element table, Jev answers operation and target as speculative parallel heads in a single round trip, and a small LLM is called only for TYPE_TEXT. That is why Zurich-to-London on Google Flights lands in ~7s with no screenshots in the loop. The safety properties are the interesting part - model output never becomes selectors, coordinates, shell or JS; every target resolves to an observed DOM node and is rechecked for occlusion before input. Use it when latency is the product. Don't reach for it as a general agent: the action space is eight fixed operations, it needs a hosted TypeSafe key plus a text-model key, and browser-use proper is what you want for long, tool-rich, recoverable workflows.
nanobrowser — the curator's take
The lowest-friction way to get an agent driving a real, already-logged-in browser: install from the Web Store, paste keys, assign a cheap model to the Navigator and a strong one to the Planner, watch it self-correct in the side panel. Everything stays in the tab, which is exactly the tradeoff — great for privacy and for sites that demand your session, useless for headless runs, CI or fleets, and Chrome/Edge only. You are the sandbox: it can act inside every account that browser is signed into, so supervise it rather than leaving it unattended. Server-side or scripted automation belongs in a library or a CDP server instead.