How to Use Zen Browser: The Beginner's Guide (First Setup, Workspaces, Split View, and Compact Mode)

CodexFuse Team · 2026-10-30T08:00:28.857Z · 11 min read

Learning how to use Zen Browser takes about twenty minutes: install it, run the first-launch wizard, and learn three ideas — vertical tabs with workspaces, split view, and compact mode. Zen Browser is a free, open-source web browser built on Firefox's engine, with an Arc-inspired vertical-tab design that appeals to tab hoarders, students, and anyone who left Arc looking for an open alternative. This guide walks you through the whole first-use system, from installing on Windows, Mac, and Linux to managing workspaces, splitting tabs, hiding the interface with compact mode, and adding Firefox extensions and Zen Mods. Since Zen is built directly on Mozilla's browser, our Firefox beginner guide covers the underlying engine if you want to go deeper there.

What is Zen Browser?

Zen Browser is a free, open-source web browser that takes Mozilla Firefox's engine and rebuilds the interface around vertical tabs, workspaces, split view, and compact mode. It looks and behaves like Arc — tabs run down a sidebar instead of across the top — but it is community-developed, stays on the latest Firefox release under the hood, and ships new builds every one to two weeks, according to independent user documentation. The official site describes its core values as a balance of beauty, performance, and privacy. There is no CodexFuse Zen Browser tool or companion app; this guide teaches you to use the browser itself.

How do I install Zen Browser on Windows, Mac, and Linux?

On Windows and macOS, installation is one step: download the installer from zen-browser.app and run it, then follow the prompts. Linux users choose between three official builds — none of them comes from apt or the Snap Store, so do not hunt for a .deb package or a snap; any third-party one is unofficial.

The disk figures and profile folders come from ComputingForGeeks' October 2026 tests on Ubuntu 26.04 and 24.04 with Zen 1.23.4b. If you are unsure which route to take, start with the official script: it touches nothing outside your home folder and completes in under a minute on a normal connection. Run mkdir -p ~/.local/bin ~/.local/share/applications first on a brand-new account, because the script calls mkdir without -p and stops halfway if ~/.local does not exist yet. Then fetch the installer with the command from the official Linux guide and pipe it to bash:

curl -fsSL https://github.com/zen-browser/updates-server/raw/refs/heads/main/install.sh | bash

When the run prints "Installation is successful," load your profile into the current terminal with source ~/.profile and check zen --version — the test machine reported "Mozilla Zen 1.23.4b." For the Flatpak route, Zen's own docs recommend flatpak install flathub app.zen_browser.zen; Flathub publishes builds within hours of the GitHub release. Do not run the tarball and the AppImage side by side: both share ~/.config/zen and one profiles.ini, which gets confusing fast. One Ubuntu-specific note from the same tests: the tarball build prints a sandbox warning ("CanCreateUserNamespace … EPERM") on Ubuntu 26.04 and 24.04 because neither release ships an AppArmor profile for a browser living in your home folder — the browser still works, but one layer of page isolation is missing until you add the small profile the guide provides.

What does the first-run setup ask for?

The first launch opens a short wizard, and every card can be changed later in Settings, so you cannot get it wrong. It walks through six choices in order:

1. Import bookmarks, history, and passwords from another browser, or skip.
2. Pick a color for your first space (your first workspace).
3. Choose a default search engine: Google, Bing, or DuckDuckGo.
4. Say yes or no to Zen installing uBlock Origin for you — saying yes starts you with ad blocking already on, and you can remove it any time.
5. Pin web apps such as GitHub, Slack, or Notion to the sidebar, or skip for now.
6. Decide whether Zen becomes your default browser.

Click "Dive in!" on the last card and you land in the main window: tabs run down the sidebar on the left, the address bar sits at the top of that sidebar, and a "zen basics" space holds a welcome tab you can close. Before collecting bookmarks, open about:profiles in a new tab and note where your data lives — the current tarball build keeps it under ~/.config/zen with the cache in ~/.cache/zen, which is the folder to back up.

How do vertical tabs and workspaces work in Zen Browser?

Vertical tabs are the whole point of Zen: instead of a horizontal tab strip, your tabs stack down the left sidebar, so dozens of tabs stay readable instead of shrinking into slivers. Workspaces sit on top of that system — each workspace is a separate set of tabs for one project or context, and switching between them swaps the entire sidebar at once.

To organize yourself: create a workspace per context (work, study, personal), give each its own name and color, and move tabs into it. Jump between workspaces with Ctrl+Alt+Right and Ctrl+Alt+Left (the current defaults, listed under Settings → Keyboard Shortcuts). Tabs you need everywhere — email, calendar, a music tab — go into Essentials: these are pinned at the top of the sidebar and stay visible across every workspace. Because Zen runs on Firefox's engine and supports Firefox Sync, signing in pulls your bookmarks, history, saved passwords, and extensions into the new setup the same way it would on a fresh Firefox install.

How do I use split view in Zen Browser?

Split view puts two or more tabs side by side in one window, which is made for comparing documents, following a tutorial while you work, or reading a source next to your notes. To start one, hold Ctrl (or Cmd on a Mac), click a second tab in the sidebar so both are highlighted, then press the shortcut for the layout you want:

• Ctrl+Alt+V — split the selected tabs vertically (side by side).
• Ctrl+Alt+H — split the selected tabs horizontally (stacked).
• Ctrl+Alt+G — arrange the selected tabs in a grid.

The sidebar shows the split tabs as a single joined tab. Press Ctrl+Alt+U to close the split and return them to separate tabs. The mouse-only route works too: select several tabs with Shift or Cmd, right-click, and choose "Split N Tabs." These are the current defaults from the October 2026 build; if a binding feels off, check Settings → Keyboard Shortcuts, because Zen is in active development and shortcuts have moved before.

What is compact mode in Zen Browser?

Compact mode hides the sidebar and toolbar so the web page fills the whole window, then brings them back when you need them — the official description is that it "gives you more screen real estate by hiding the tab bar when you don't need it, and showing it when you do." Toggle it with Ctrl+S. Two warnings come with that shortcut: older guides list Ctrl+Alt+C for compact mode, which is stale, and Ctrl+S no longer saves the page — Zen moved "Save Page" to Ctrl+Alt+Shift+S, so rebind one of the two in the settings screen if you save pages often.

For layout control beyond the toggle, open Settings → Look and Feel, which offers three sidebar layouts: Only Sidebar, Sidebar and Top Toolbar, and Collapsed Sidebar. Ctrl+Alt+S toggles a floating sidebar — a middle ground between full and compact. Zen also ships a Glance view: a floating command bar on Ctrl+T (or Cmd+T) that searches open tabs across all workspaces and jumps to pinned bookmarks, plus a temporary pop-over that previews a link and disappears when you click away, keeping workspaces free of throwaway tabs.

Do Firefox extensions and Zen Mods work in Zen Browser?

Yes to both, and they are different things. Because Zen is a Firefox fork, any extension from addons.mozilla.org installs exactly the way it does in Firefox — uBlock Origin, password-manager extensions, and developer tools all carry over, and your Firefox Sync account brings your existing extensions with you. One practical note from setup guides: external password managers such as 1Password may not recognize Zen out of the box; in the 1Password desktop app, open Settings → Browser → "Connect to additional browser" and add Zen there.

Zen Mods are Zen's own layer on top: community-built interface tweaks you toggle with one click from Settings → Zen Mods or at zen-browser.app/mods/. Popular ones include Better Unloaded Tabs (greys out unloaded tabs so you can spot them), Only Close On Hover (shows a tab's close button only on hover), and Quietify (adds a visualizer animation to the mute button on tabs). If you want deeper surgery than mods allow, Zen still honors userChrome.css in your profile's chrome folder, the same customization path Firefox power users have used for years. A useful default to know: Zen unloads inactive tabs after 40 minutes to free memory, with a visual indicator showing which tabs are in memory and which are not.

Zen Browser vs Arc vs Firefox: which should you pick?

Pick Zen if you loved Arc's vertical tabs and spaces but want an open-source browser that is still actively developed: Zen is free, its code is public, it tracks the latest Firefox engine so vanilla web features never lag, and Firefox Sync keeps passwords, bookmarks, history, and sessions client-side encrypted across your devices. Pick Firefox itself if you want the plain, battle-tested browser with no new interface to learn — the difference between the two is interface and pace of change, not web compatibility. If the reason you are shopping is AI built into the browser window rather than tabs and workspaces, that is a separate category: our what is an AI browser guide maps that landscape, and our Dia beginner guide covers one of the leading AI-first browsers for comparison.

Two honest limits decide it for many people. First, Zen has no DRM support: Netflix, HBO, and Disney+ will not play in it, so keep Firefox installed alongside for streaming (YouTube is unaffected). Second, Zen has no mobile app — you cover that with Firefox mobile signed into the same Firefox Sync account, which picks up bookmarks and everything else you sync. Zen's rapid release cadence is both the appeal and the tax: features, shortcuts, and the mod system move between builds, so treat any shortcut list — including this one — as current as of its check date and verify in Settings → Keyboard Shortcuts.

How to use Zen Browser faster: the keyboard shortcut cheat sheet

These are the defaults exactly as they appear under Settings → Keyboard Shortcuts in the current build, verified against the October 2026 release in independent testing. On macOS, swap Ctrl for Cmd where the system layout expects it.

Sources

Facts and figures in this guide were checked on 2026-10-30 against these sources: the official Zen Browser site (workspaces, compact mode, Glance, and split view descriptions); ComputingForGeeks' "Install Zen Browser on Ubuntu 26.04/24.04: 3 Ways" (updated 2026-10-26 — the install routes, disk figures, profile folders, first-run wizard steps, and the current keyboard-shortcut table, tested on Zen 1.23.4b); avladov.com's "Zen Browser: An Open-Source Alternative to Arc" (updated 2026-07-12 — open-source status, Firefox Sync, update cadence, Zen Mods examples, DRM and no-mobile caveats, Essentials tabs); and Android Infotech's "Zen Browser Is the Best Arc Browser Alternative" (October 2026 — the floating command bar, Glance view, and Zen Mods overview).

Frequently Asked Questions

Is Zen Browser free?

Yes. Zen Browser is free to download and use on Windows, macOS, and Linux, and it is open source — the code is public on GitHub, and the project is kept alive partly by sponsors and donations.

Is Zen Browser safe to use?

Zen is built on Mozilla Firefox's engine and tracks the latest Firefox release, so it inherits Firefox's security updates and web compatibility. Being open source means its code can be inspected, and Firefox Sync encrypts synced passwords, bookmarks, history, and sessions on your device. It is still a fast-moving project, so keep it updated.

Can Zen Browser play Netflix or other streaming services?

No. Zen lacks DRM support, so Netflix, HBO, Disney+, and other DRM-protected streaming sites will not play in it — YouTube works fine. Keep a copy of Firefox installed for streaming; this is the one compatibility gap most new users trip over.

Does Zen Browser sync across my devices?

Yes, through Firefox Sync: sign in with your Firefox account and your bookmarks, history, saved logins, and extensions follow you. There is no Zen mobile app, so on your phone you install Firefox mobile signed into the same account to pick up everything Zen syncs.

How do I update or uninstall Zen Browser on Linux?

It depends on your install route: re-run the official install script for the tarball (it detects and replaces the old copy), run flatpak update for the Flathub build, or re-download the AppImage file. To remove the tarball build, delete ~/.tarball-installations/zen, the launcher at ~/.local/bin/zen, the desktop entry at ~/.local/share/applications/zen.desktop, and — only if you are sure — the profile at ~/.config/zen, which holds your bookmarks and history.