The web, your way.
Clean, fast, and yours.

Jace Browser is a free browser built on Firefox. Vertical tabs, your Jace account with end-to-end encrypted sync, themes, and none of the tracking or clutter.

Windows, macOS and Linux · free and open source

Jace Browser with vertical tabs and the Jace new tab page

Everything you need, nothing you don't

All of Firefox's speed, privacy and add-ons, with Jace's look and your Jace account built in.

🗂

Vertical tabs

Tabs down the side with names, only icons, or icons that grow when you hover. Or tabs across the top: switch any time with Ctrl+Alt+V.

🔐

Jace sync, encrypted

Bookmarks, history, passwords, open tabs, settings and add-ons, encrypted on your device with your passphrase before they leave it.

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Signed in everywhere

Sync your site sign-ins too, so signing in on one device signs you in on the others. Jace's own sites sign you in automatically.

⌨

New tab, over the page

Ctrl+T opens a search box over the page you're on: search, type an address, or jump to a tab that's already open.

🎨

Themes

Light, dark and colorful themes, your own colors, or any theme from Firefox's add-ons site.

🛡

No tracking

Mozilla's telemetry, studies, ads and sponsored suggestions are off and locked. So are Firefox's AI features and VPN promos.

🔌

WebUSB

Websites can talk to USB devices you pick, like microcontroller boards and other gadgets with web tools. Firefox doesn't do this on its own.

🎬

Streaming

Widevine DRM on Windows and macOS, for streaming sites that need it.

Take a look

The same look on every page, from the new tab to settings.

The new tab search box over the page, with only-icons tabs and the Midnight theme
Ctrl+T: a search box over the page (Midnight theme, only-icons tabs)
Jace Browser with the Sky theme
The Sky theme, with only-icons vertical tabs
Tabs across the top, the Rose theme and the downloads list
Tabs across the top, the Rose theme and the downloads list
Settings: Jace account and sync
Your Jace account and sync, in Settings
Settings: the look of Jace Browser
Make it yours: tabs, window buttons, themes
The welcome setup
A one-minute setup the first time you open it

Already have a browser?

The Jace extension brings your Jace account to Firefox and Chrome, and syncs with Jace Browser.

  • Sign in with your Jace account
  • Encrypted sync of bookmarks, history, open tabs and site sign-ins
  • Your add-on list, so your other devices can install the same ones
  • Signed in to Jace's websites automatically

FirefoxChromeEdgeBrave

Chrome: unzip it, open chrome://extensions, turn on Developer mode and click Load unpacked.

Install it in a minute

Download it, open it, and the setup does the rest: tabs, look, search engine, your Jace account.

Windows 10 / 11

Run the setup .exe. If SmartScreen appears, click More info → Run anyway: it isn't code-signed yet. There's also a portable .zip.

macOS

Open the .dmg and open Jace Browser from it. The first time, right-click it and choose Open. The setup then moves it to Applications for you.

Linux

Make the .AppImage executable (chmod +x) and run it. The setup adds it to your apps menu and app center.

All releases · Source code