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felarof

820 karma · joined August 23, 2014

Building open-source, privacy-first agentic OS -- browserOS.com
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felarof··on Show HN: Open source alternative to Perplexity Comet
Also, ex-Google engineer here :) Rtrvr looks like great product too!

Definitely understand that keeping up with security patches is important. And this is an engineering challenge and not implausible to do -- Perplexity is 1/1000th the size of Google and they could be build a better product. So, "you can just do things".

We are still on day 1 of launch. We will only get better from here. And we won't be 2 people forever. We plan to hire, expand team and take on the engineering challenges.

felarof··on Show HN: Open source alternative to Perplexity Comet
Haha, thank you!

As a small startup we cannot outspend Perplexity Comet in marketing, so we just said open-source alternative so that people get what we are building.

felarof··on Show HN: Open source alternative to Perplexity Comet
> How does this make money? Surely this will have a cloud offering?

Our plan is to make the consumer version of the browser for free and sell licenses for enterprise version.

This is similar to how many open-source projects sustain development.

And enterprise browsers are picking up -- Island browser, Talon browser.

felarof··on Show HN: Open source alternative to Perplexity Comet
+1, enabling uBlock origin could be a short term solution.

But we are working on adding built-in adblockers just like Brave + enhancing it to detect more ad formats using lightweight local LLM.

felarof··on Show HN: Open source alternative to Perplexity Comet
This was definitely a hard choice.

We spoke to folks who had built browser on top of webkit and they spent nearly 2years just fixing random bugs and getting sites to work. I'm sure firefox/gecko engine would probably work better than webkit, but the point still is: if we don't use chromium, a lot of work does have go into fixing website compatibility issues, adding support for extension. We're 2 person startup and chromium codebase was easier to build on top of and provides a solid baseline.

And Brave has shown that you can build a privacy-focused browser on top of chromium still.

In the agentic browser era, I think there are so many low hanging fruits on privacy which are more important to address -- sending all your sensitive data to Perplexity Comet to sell ads is a pretty bad option right now. Supporting local LLM, letting folks bring their own API keys is crucial.

felarof··on Show HN: Open source alternative to Perplexity Comet
This is very useful feedback, thank you!

We will look into add a cursor movements; key typing should already appear like a human would (but probably we can slow it down a bit).

felarof··on Show HN: Open source alternative to Perplexity Comet
Hmm, what do you mean? Could you elaborate? Thanks!
felarof··on Show HN: Open source alternative to Perplexity Comet
It is just a warning. We working on getting Microsft Windows signing set up.
felarof··on Show HN: Open source alternative to Perplexity Comet
thanks for joining! DMed you.
felarof··on Show HN: Open source alternative to Perplexity Comet
Yes! We want to do this.

We were thinking of implement MCP protocol into the browser, so the browser can be an MCP server (that exposes bunch of tools -- navigation, click, extract) and you can connect that to your agent, would that work?

What is your use-case? Happy to chat on discord! https://discord.gg/YKwjt5vuKr

felarof··on Show HN: Open source alternative to Perplexity Comet
Yes! We are excited to build BrowserOS-OS! I think with agents the whole UX can be re-imagined.

I'll check out FydeOS!

felarof··on Show HN: Open source alternative to Perplexity Comet
True, there are plenty of libs already available to do such an automation if you are (or can hire a) dev.

But for non-technical folks, agentic browsers seems like a good UX to build such and many more automations.

felarof··on Show HN: Open source alternative to Perplexity Comet
Brave Browser (70M+ users) has validated that a chromium fork can be viable path. And it can in fact provide better privacy and security.

Chrome extensions is not a bad idea too. Just saying that owning the underlying source code has some strong advantages in the long term (being able to use C++ for a11y tree, DOM handling, etc -- which will be 20-40X faster than injecting JS using chrome extension).

felarof··on Show HN: Open source alternative to Perplexity Comet
Yes, right now using Gemini API on our liteLLM server (we can't expose API key on client side).

We are working on smaller, fine-tuned model too, which will be the default soon! It should be much faster and precise at navigation tasks.

felarof··on Show HN: Open source alternative to Perplexity Comet
Great points! For sure, the whole agentic browsers space is still super early.

We are also just getting started and trying to narrow down on a high-value niche use-case.

There are few repetitive, boring use-cases where time saving could be meaningful -- one example: Walmart 3rd-party sellers routinely (multiple times a day) keep checking prices of the competitor products to price their products appropriately. This could be easily automated with current agentic browsers.

felarof··on Show HN: Open source alternative to Perplexity Comet
We working on it! Should have pretty soon!
felarof··on Show HN: Open source alternative to Perplexity Comet
Good question, so far we have been building on top of chromium release that Google Chrome is based on.
felarof··on Show HN: Open source alternative to Perplexity Comet
The default model is Gemini.

You can bring your own API keys and change the default to any model you local.

Or better run model locally using Ollama and use that!

felarof··on Show HN: Open source alternative to Perplexity Comet
Oooh, that's a nice idea! We'll look into doing that!
felarof··on Show HN: Open source alternative to Perplexity Comet
IIRC, Firefox's web extension API does not provide access to accessibility tree as well.
felarof··on Show HN: Open source alternative to Perplexity Comet
Yes, we want to do this too! We'll expose much more richer APIs.

What use-cases do you have in mind? like scraping?

felarof··on Show HN: Open source alternative to Perplexity Comet
We just started cooking, very soon you should be able to do this!
felarof··on Show HN: Open source alternative to Perplexity Comet
we support Mac (apple silicon and intel) and Windows.

hardware requirements are minimal, same as Google Chrome, if you BYOK API keys for agents and are not running LLMs locally.

felarof··on Show HN: Open source alternative to Perplexity Comet
Thank you!

Browser wars have begun.

> that OpenAI will be launching a (presumably not open source) browser of their own this summer.

For sure, won't be open-source. I bet in some parallel world, openAI would be non-profit and actually open-source AI :)

felarof··on Show HN: Open source alternative to Perplexity Comet
The agent running by itself shouldn't impact battery life, it is similar to a lightweight chrome extension and if you think about it, it's an agent browsing the web like human would :)

If you run LLMs locally (using Ollama) and use that in our browser, that would impact battery life for sure.

felarof··on Show HN: Open source alternative to Perplexity Comet
We don't mind upstreaming. But I don't think Google Chrome/Chromium wants to expose it as an API chrome extensions, if not they would've done this long time ago.

From Google's perspective, extension are meant to be lightweight applications, with restricted access.

felarof··on Perplexity launches Comet, an AI-powered web browser
Even if apple buys, would they kill Safari? I don't think so -- comet will have to die in that case.
felarof··on Perplexity launches Comet, an AI-powered web browser
+1, I bought perplexity pro annual subscription last year, and hardly use it now.

chatGPT+o3 search is much better.

My typical workflow is fire the question to Google AI mode and chatGPT+o3 at the same -- AI mode is fast but meh answer, chatGPT is slower but pretty good answer always.

felarof··on Perplexity launches Comet, an AI-powered web browser
this is on our radar, we should have a linux build in 2-3 days!

we have macOS and windows build as of now.

felarof··on Perplexity launches Comet, an AI-powered web browser
if you want an open-source, privacy-first option -- check out https://news.ycombinator.com/item?id=44523409 :)
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