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BuildWithJev
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AppSep 18, 2026

Ulka

Experimental browser agent powered by FX, Jev, and Vercel AI Gateway. Bring your own API key to read pages and automate browser tasks.

Ulka is a local Chromium extension that drives the browser with FX, Jev, and a Vercel AI Gateway key. There is no application backend: the side panel plans a task, Jev picks a constrained action from the observed page, and Ulka executes it.

The author posted a demo finding flights from Stockholm to Kathmandu, then following through LinkedIn, Google Analytics, and a multi-step research loop.

How it works

  1. FX breaks the task into browser subgoals.
  2. Jev selects one allowed action from the observed page elements.
  3. Ulka validates the target, asks for approval when needed, and records evidence.

Supervise it on signed-in sites. The default engine needs WebAssembly JSPI; otherwise switch to Classic in settings.