Show HN: Cursor's "Tab" Model in the Browser

https://www.tryactions.com/extension

3•killianlucas•4h ago

Hey HN! Wanted to share a project me and @vicdotso (https://vic.so) built this month— it predicts the next thing you’re going to do in your browser, then lets you press CTRL+CTRL to accept the prediction.

It’s incredibly fast. Uses Qwen-3 on Groq, with context of your DOM + the DOM from your last tab. Video demos are on the chrome extension page.

We worked forward from this theory: Code models exploded in popularity once you could use them for code completions (Github copilot, Cursor’s tab). Maybe computer-use models will have the same beginning?

Would love your thoughts on this / related ideas. Will computer-use products ever take off? What will that product look like? Why didn't Natbot (https://news.ycombinator.com/item?id=33847504) work?

Comments

pvg•4h ago

Doesn't this send an awful lot of potentially private/sensitive browsing info to two places - your service and the LLM provider?

killianlucas•3h ago

Our goal is to build this locally— there's even some heuristics we've found (i.e clicking the same items in a row every time you visit a website) that can give really good completions without an LLM.

Chrome is even starting to ship a small Gemma model in the browser, but we haven't seen great performance from Gemma yet.

But yes, and I have the same concerns w/ this, code completions, Grammerly etc. Hopefully all these tools will follow the same trajectory (some usage with a cloud setup -> distilled into a small local setup).

pvg•3h ago

Grammarly, LLM code assistants, etc tell you upfront that this is happening and the type of info sent over is at least somewhat constrained. 'Everything I do in the browser, to multiple internet strangers' is a much bigger hurdle, especially without clear information. I think you need to figure out some way to safely demonstrate this to (informed) users - as it is, it feels far too iffy to even try which somewhat defeats the purpose of a Show HN.

codingdave•4h ago

Seems like algorithms to send me the next content in my browser is exactly where social media went wrong. Why would anyone want an AI equivalent?

killianlucas•3h ago

It depends where the tech is applied IMO — for your information diet it's destructive to give up any control.

For filling out forms, copying and pasting between tabs, other web drudgery.. I think it's just a bad computing experience, and people would welcome something better than copy/paste (tech from half a century ago!)

codingdave•2h ago

If you think it is a bad experience, then make a better one, don't automate the bad one.

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