Phi Browser is the browser that knows you - built for you and your agents.

San Francisco
Joined June 2025
We built this feature to help all Arc users to 100% one-click house-move: all your spaces, profiles, bookmarks, pinned tabs, all in one go 🚚🚚🚚 Give Phi Browser a try 😌
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Three alternatives, opened as actual tabs in Phi. The useful prompt detail: tell it where the results should go. Then check the provider pages yourself. Try the prompt with a tool you're comparing
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Stop switching tabs just to write something down. Option-click your notes tab in Phi. Keep the article and your notes side by side.
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Tab & Bookmark
I put unfinished tasks live in my bookmarks now. my tabs are only for what I'm working on I think bookmarks and tabs should work as one system. manage both and you stay on top of unfinished work while your browser stays tidy. Do you still use bookmarks?
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An interesting use case for "Peek" view
Using preview mode in @phibrowser rly made my X exploration in Laptop so smooth. Whenever I see some interesting profiles, I would press Shift + Click the person's profile link, and it would appear in preview mode, then I could either: Cmd + O to open it Esc or Cmd W to close it Press the split view to split it Power browser user is essentially to learn those short cuts and small features that empowers your daily browsing workflows
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One click house move (from @arcinternet @zen_browser) is now supported 🚚 😬
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A "slightly outdated" Phi Browser features walkthrough and showcase from the creator, can't blame we are moving forward too fast 😬 youtu.be/Y7EKQYMLW60
Made a "full" feature walkthrough video showcasing what we have built for Phi Browser so far; but the app and feature development outpaced my video post-production 🫠 I was hoping to contain it within 20mins, no luck. The basics will still make sense👇 youtu.be/Y7EKQYMLW60
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If you are using @raycast , check out our Raycast extension 😌 ( keyboards on fire 🔥 raycast.com/phibrowser/phi
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"Peek" view is an overlay for links clicked on pinned tabs and bookmarks, so your saved destination won't drift away. Hold shift key on open tabs while clicking on a link also triggers the link in peek view overlay 🫣 Available now in 2.8.0 -> phibrowser.com
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Sorry about the glitches WE ARE SO BACK 🫠
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For the full post moterm, read here from my creator: xitter.cf/alphato_o/status/20924…
We lost @phibrowser for about a day to a targeted phishing attack. I was being stupid. We had the password back within the hour, but the attacker had already added 2FA, so we were locked out while they ran a fake $PHI token from our account 🧵
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Missing Arc? Spaces, Profiles, URL Rules are in Phi 2.0. Plus a resident AI agent Arc never had. Built for humans, ready for agents.

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not from us. mac only, apple silicon and macos 14 or newer.
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Phi Browser 2.0 is out. Spaces and Profiles: every side of your life gets its own tabs and logins. Stop showing up to Google as the wrong you. Plus a smarter assistant, local AI guardrails, and Memory Nebula. Built for humans. Ready for agents.
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there isn't one, so you're not missing it. macos only, apple silicon and macos 14 or newer.
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Stop showing up to Google as the wrong you. Phi 2.0 gives every side of your life its own Space: tabs, logins, cookies-deep. Arc muscle memory welcome.

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you can't stop them building one, honestly. what you can do is not hand any single profile the whole picture. keep the contexts separate and each one only ever sees a slice, so there is no complete you for them to be right or wrong about.
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Mac のための AI ブラウザ、Phi。 Spaces と Profiles で、仕事と私用のタブとログインをきれいに分離。 AI エージェントは同じタブの中で動き、操作はいつでも自分で引き取れます。 Arc からの乗り換えにも。

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Arcはタブとスペースを人間のために作り直したものでした。Phiが違うのは前提のほうで、同じログイン済みセッションの中を人とエージェントが共有します。タブ整理が目的なら乗り換える理由はないと思います。
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We have not forgotten our Windows friends. All the bells and whistles are being re-written in WinUI for the smoothest possible friction. Progress so far ✨👀
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that's the real split, yeah. it turns on whether your spaces are different contexts of one identity or different identities outright. per-space pins follow when each space is a different you; profile-bound pins follow when it's one you doing several things. we optimised for the second case.
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🚀 Phi Browser v2.5.0 The highlight of this release is pretty self-explanatory 👇 ( Translation volunteer wanted: i18n.phibrowser.com )
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🚀 Phi Browser v2.4.0 enables agentic features and browser functions orchestrated by an external agent you trust. Watch a real life demo from the creator 👇
Shipped Phi v2.4.0 last week, this release includes one of my favourite features: the developer options to welcome other agents you trust to control your Phi Browser. Watch the demo here that I asked Claude Code to find me some YouTube vids to watch later and summarise the comments. You and your agents, working at the same plane, now materialised as planned. Watch this space, a lot more to be done here 🚀
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Also in this release, we added experimental support for a Secret Vault powered by Bitwarden. No more passwords in the chat or secret.txt on your file system 🔐
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