v3.0.0 · FoxAI One

Private. Smart. Fox-fast.

A Firefox-based browser that respects you: no telemetry, no tracking, an AI sidebar that only sees what you allow, and a new-tab that is actually yours. Portable, open source, yours to verify.

Download FoxAI Browser View on GitHub

Portable · Windows · Firefox ESR base · no installer · ~324 MB

What is FoxAI Browser?

FoxAI is a branded, portable build of Firefox ESR — hardened defaults, four built-in WebExtensions, and a PowerShell pipeline that reproduces every release from source. No installer, no background services, one folder you can delete.

Fox

The proven Firefox engine, rebranded and locked down: telemetry off, referrer off, first-party isolation on.

AI

An assistant that waits for permission — ChatGPT, Claude, Gemini or local Ollama. No page data leaves until you click Allow.

Yours

Your new-tab, your notes, your bookmarks — stored only in the browser. Nothing phones home.

Why it exists

Browsers collect too much, show you too little, and add features you never asked for. FoxAI is the opposite.

It began with a deletion

The original project was wiped. FoxAI was rebuilt from a ~7,000-file salvage backup — and every sneaky default (telemetry, prefetch, referrer) was questioned and, where it leaks, turned off.

Verifiable, not "trust us"

Each release lists the exact leak that was closed and how. Read the changelog, rebuild from source, run the tests. Nothing on faith.

For daily use

Privacy is useless if the browser is painful. Notes, to-do, bookmarks, quick search, AI help, mouse gestures — without the harvest.

Everything you need. Nothing that leaks.

FoxAI Start

Private new-tab: clock, weather (opt-in), notes, to-do, bookmarks, custom backgrounds and 7 themes — only in your browser.

AI Sidebar

Summarize, translate, explain, rewrite any page. ChatGPT · Claude · Gemini · local Ollama — key never leaves the browser.

Gesture navigation v2

Right-drag to go back, forward, reload or new tab. Configurable presets via gestures.json.

uBlock Origin built in

Ads, trackers and fingerprinting blocked out of the box, enforced via policies.json.

Private search

DuckDuckGo by default, suggestions off. No keystrokes, no referrer, no predictive calls.

Hardened by default

RFP on, first-party isolation, HTTPS-only, WebRTC off, beacon/ping off, strict CSP everywhere.

Perfect Fingerprint 100/100

Deterministic fingerprint: letterboxing off, fixed metrics, UTC locked. 100% similarity across instances — canvas per-session randomized by design (CANVAS ENTROPY PASS).

Tor Mode (opt-in)

Route all traffic via SOCKS5 127.0.0.1:9050 with "FoxAI Tor.cmd" — DNS through SOCKS, WebRTC dead, no leaks. Normal ↔ Tor by profile swap.

Containers Pro

Container tabs UI for contextual identities — isolate work, personal, shopping.

Media Lockdown

Autoplay, camera, mic and geolocation default-deny — ask only when you allow.

Download Safety

Ask-before-new-types for uncommon downloads. No silent execution.

Startup Guard

Blank startup, no crash-session restore. You decide what reopens.

A browser you can see yourself in

FoxAI Start is yours to make: themes, backgrounds, clock and search engine — all local.

FoxAI Start new-tab

New-tab with notes, to-do and quick search — stored only locally.

AI Sidebar

Summarize the current page with one consent click.

Container tabs

Mouse-only navigation that feels physical, not bolted on.

Screenshots — FoxAI Start, AI Sidebar, Containers (no stock images).

Screenshots

Add real captures to screenshots/ — the gallery picks them up automatically. Until then, placeholders stay.

Main browser — FoxAI Start
Main window + FoxAI Start
AI Sidebar — consent-gated
AI Sidebar — consent-gated
Tabs & containers
Tabs, address bar, containers
Settings & privacy toggles
Settings & privacy toggles
Tor mode — SOCKS5
FoxAI Tor.cmd — SOCKS5

What FoxAI is built on

No dark magic. A real engine, standard extension APIs, and a reproducible pipeline.

Firefox ESR

Extended-support Firefox, rebranded “FoxAI Browser” via rcedit + foxai.cfg. Portable: unzip and run.

Four WebExtensions (MV2)

New-tab, AI, search & gestures installed via policies.json — sites cannot disable them.

React + Vite

FoxAI Start is a small React app with Vite, shipped as static assets under strict CSP.

PowerShell pipeline

build-manual.ps1 / build.ps1 packages XPIs, fetches uBlock, brands binaries, writes policies and the release zip.

BiDi test suite

WebDriver BiDi drives headless FoxAI; checks fingerprint 100/100, CANVAS ENTROPY, new-tab, search and AI.

Portable

No installer, no services, no registry. One folder you can delete.

How it was built

  1. Rebuilt from ~7k-file salvage backup → new-tab, AI, search, gestures, build & tests (v1.0).
  2. Hardening audits: CSP, first-party isolation, DoH, RFP, partition + clear-on-shutdown.
  3. FoxAI One (v3.0.0): deterministic fingerprint 100/100 + opt-in Tor mode via SOCKS5 profile.
  4. Reproducible: build-manual.ps1 → release/FoxAI-Browser-v3.0.0.zip (324 MB).

Privacy you can verify

No claims without code. Read config/user.js and foxai.cfg — every toggle is there.

  • No telemetry, no data collection
  • Referrer, beacon & ping disabled
  • First-party isolation on; cookie partitioning + clear on shutdown
  • Prefetch / predictor / DNS prefetch off; DoH via Cloudflare
  • Autofill & form history off; letterboxing off (deterministic sizing)
  • Camera / mic / geo default-deny; autoplay blocked
  • WebRTC disabled — no IP leaks; HTTPS-only on
  • Weather opt-in (no location by default); sensors/battery/beacon off
  • Content scripts only inside the browser; strict CSP, no inline, no iframe
  • Punycode shown for spoofing; partitioned storage
  • Tor mode (opt-in): all traffic + DNS via SOCKS5, WebRTC dead
  • Only sites you visit ever contacted; phone-home (studies, captive, region) off
  • Fingerprint: 100/100 similarity + CANVAS ENTROPY PASS (per-session canvas noise)
  • Every fix in CHANGELOG.md — build and check yourself

Open source

No black box. Every commit public, every build reproducible.

View Source on GitHub Releases

MPL-2.0 (browser) · GPLv3 (uBlock Origin) · issues and PRs welcome.

Get FoxAI Browser

Portable Firefox ESR build. Unzip, run, done — nothing installed to your system.

Windows

Recommended · Portable zip

Download v3.0.0

~324 MB · Firefox ESR base · unzip & run FoxAI Browser.cmd

All releases · Build from source

Linux

Build from source

View on GitHub

Use build-linux/ — no prebuilt zip yet.

macOS

Not yet

View on GitHub

Community build planned — source is public.

  1. Unzip FoxAI-Browser-v3.0.0.zip anywhere
  2. Run FoxAI Browser.cmd (normal) or FoxAI Tor.cmd (Tor mode, after scripts/install-tor.ps1)
  3. Done — FoxAI Start, AI Sidebar, gestures & uBlock ready

Verify: tests/test-fingerprint-benchmark.ps1 → 100.0% + CANVAS ENTROPY PASS · browserleaks.com · ipleak.net

FAQ

What is FoxAI Browser?

A portable, hardened Firefox ESR build with FoxAI Start new-tab, AI sidebar, gestures and uBlock Origin preinstalled. One folder, no installer.

Is it open source?

Yes — source at github.com/Can-5/foxai-browser (MPL-2.0; uBlock GPLv3). Every release is built reproducibly via build-manual.ps1.

What is it built with?

Firefox ESR engine (Gecko), four WebExtensions (MV2) for new-tab/AI/search/gestures, React+Vite for the new-tab UI, PowerShell build pipeline, WebDriver BiDi tests.

Which platforms are supported?

Windows portable is primary. Linux: build from source via build-linux/. macOS: not yet prebuilt, source available.

Is it free?

Yes, free and open source. No premium, no telemetry, no ads of its own.

Where can I download it?

Latest zip on GitHub Releases (v3.0.0, ~324 MB). Also “Build from source” in the repo.

How can I contribute?

Open an issue or PR on GitHub. See CHANGELOG.md for style and testing (BiDi suite).

How does the AI work?

The sidebar supports ChatGPT, Claude, Gemini or local Ollama. Page content is sent only after you click “Allow page access” — one action at a time, revocable, keys stored locally.

Roadmap

Completed

  • v3.0.0 FoxAI One — 100/100 fingerprint + Tor Mode
  • v2.7–2.14 Perfect Fingerprint, Containers Pro, Media Lockdown, Download Safety, Search Privacy, Gestures v2, Startup Guard
  • v1.8.0 RFP on, phone-home off, partitioned storage, Hub
  • v1.5.1 DoH on, WebRTC no-leak, Safe Browsing reporting off

In Progress

  • site This bilingual site — Cloudflare Pages primary, GitHub Pages backup
  • tests More BiDi coverage for Tor and fingerprint

Planned

  • Linux prebuilt & macOS community build
  • Real screenshots to replace placeholders
  • Auto-update polish

The road so far

Built in public. Yours to keep.

Star it, fork it, break it — every commit is yours to read.

★ View Source Open an issue