Zen Browser Extensions: How to Install Them (2026 Guide)

You switched to Zen for the clean vertical tabs, opened the Add-ons Manager to bring your extensions across, and hit a wall: where is the Chrome Web Store? It isn’t there, and it isn’t coming. Zen is a Firefox fork (built on Firefox 152 as of mid-June 2026), so it pulls extensions from addons.mozilla.org instead. Open the Add-ons Manager with Ctrl+Shift+A, browse addons.mozilla.org, and click “Add to Firefox” on any add-on. Chrome extensions do not install.

Whether that wall is a minor detour or a dealbreaker depends entirely on which extensions you rely on. The rest of this guide covers the exact install steps, which extensions carry over from Chrome, which break, and what to do if your stack is Chrome-only.

How to Install an Extension in Zen Browser

There are two ways into the Add-ons Manager, and both end at addons.mozilla.org.

The keyboard route:

1. Press Ctrl+Shift+A to open the Add-ons Manager (this is the Firefox shortcut, and it works unchanged in Zen).
2. Click Find more add-ons, which sends you to addons.mozilla.org.
3. Search for the add-on you want, open its page, and click Add to Firefox.
4. Confirm the permission prompt. The add-on appears in your toolbar or menu, exactly as it would in Firefox.

The URL-bar route:

1. Click the settings icon in the URL bar.
2. Select the plus icon to jump to the Add-ons Manager page.
3. From there, follow steps 2–4 above.

You can also reach the manager through the main menu under Add-ons and themes. All three paths land in the same place. The “Add to Firefox” button label is correct here — Zen reuses Firefox’s installation machinery, so the button keeps its Firefox wording even though you are running Zen.

Once installed, an add-on manages itself like any Firefox extension: pin it to the toolbar, set per-site permissions, or disable it from the Add-ons Manager. Nothing about the management flow is Zen-specific.

Which Chrome Extensions Carry Over (and Which Don’t)

This is the question that actually decides whether Zen is switchable for you. The store is different, so an extension is only available in Zen if it has a Firefox build on addons.mozilla.org.

Many of the most-used extensions ship in both stores and move over without friction:

The reliable carry-overs are the big, well-maintained, cross-platform tools. Where people get stuck is the long tail: a niche productivity extension, a company SSO helper, a Chrome-specific developer tool, or anything built for Chrome’s APIs with no one porting it to Firefox. If your daily workflow leans on one of those, Zen cannot run it, and no setting changes that — it is a Firefox-engine limitation Zen inherits.

One upside worth naming: because Zen is Firefox-based, you get Firefox’s full uBlock Origin rather than the Manifest V3-restricted version Chrome now enforces. For ad and tracker blocking specifically, the Firefox side is currently stronger.

If you carry over Vimium for keyboard-driven browsing, note that the Chrome side has a direct answer too: SuperchargeNavigation includes a hint mode where you hold Shift to label every link with a letter badge, then type the badge to click, or press Shift+Alt and a badge to peek the link in an overlay without leaving the page. So losing Vimium to a Chrome-only edge case is not the dead end it first looks like.

What Breaks: Themes and the Occasional Edge Case

Two things do not transfer cleanly even within the Firefox ecosystem.

Firefox themes do not work in Zen. Zen handles its appearance through its own Zen Mods system, which is separate from Firefox’s theme engine. Functional add-ons install fine; visual themes from addons.mozilla.org do not apply. If you want to restyle Zen, use Zen Mods, not Firefox themes.

A small number of add-ons hit edge cases. Zen changes the browser interface substantially, and add-ons are tested against stock Firefox first. Most install and run without issue, but an add-on that assumes Firefox’s exact UI layout or pokes at unmodified browser chrome can misbehave in Zen. This is a minority, and it concentrates in add-ons that manipulate the toolbar or sidebar directly. Core functional categories — content blockers, password managers, readers, screenshot tools — are dependable. If an add-on glitches, the Zen GitHub discussions are the place reports collect.

Zen’s Built-In Features Replace Some Extensions

Part of why Zen needs fewer extensions is that it bakes in features Chrome users reach for add-ons to get. Before hunting for an add-on, check whether Zen already ships the capability:

• Vertical tabs are the default, not an option.
• Named workspaces with tab isolation are first-class — no extension needed.
• Split view tiles up to four tabs in a grid, beyond what any Chrome extension offers.
• Glance gives a live tab preview without switching away.
• Zen Mods handle site CSS/JS customization, replacing the Stylus/UserScripts pairing.

So a chunk of a typical Chrome extension stack — a vertical-tab manager, a workspace tool, a site-styling extension — is redundant in Zen. The extensions you still need are the cross-cutting utilities (blocker, password manager, reader), and those are exactly the ones with reliable Firefox builds.

If Your Stack Is Chrome-Only: The Chrome Path

When the deciding extension has no Firefox port, switching to Zen costs you that tool, your saved passwords if they live in a Chrome-only manager, and your existing sync. For a lot of people that price is too high, and the better move is to recreate Zen’s workflow inside Chrome rather than switch engines.

Chrome already covers the structural part natively: vertical tabs shipped in Chrome 146 (enable via chrome://flags, then Settings → Appearance → Tab strip position). That gives you Zen’s sidebar layout without leaving the Chrome Web Store behind.

The features Chrome still lacks natively — named workspaces, a command bar, session recovery — come from an extension. SuperchargeNavigation adds named workspaces with full tab isolation (switching swaps the whole context, the way Zen’s do), an Alt+K command bar for keyboard-driven search across tabs, history, and bookmarks, a hint mode that labels links for mouse-free clicking and peeking, and 50 rolling auto-snapshots for session time-travel. It can also dock its sidebar in-page on the left or right, narrower than Chrome’s native side panel allows. The one Zen feature with no Chrome equivalent is the 4-pane split-view grid; Chrome’s built-in split is 2-pane only.

It runs locally with no account and zero telemetry, optional Chrome-native sync if you want it, and it keeps your entire Chrome extension library intact. For the memory and blocking side that Firefox handles structurally, SuperchargePerformance suspends idle tabs via chrome.tabs.discard() and ships 186K+ blocking rules.

Picking Your Path

The decision comes down to one question about your extensions.

If your must-have extensions all have Firefox builds (or Zen’s built-ins replace them), Zen is a clean switch and a well-designed browser in its own right. Install the cross-store essentials from addons.mozilla.org, lean on Zen Mods for theming, and you lose very little.

If even one critical extension is Chrome-only, that wall at the Add-ons Manager is the whole story: switching means giving the extension up, and that is rarely worth it. Stay on Chrome, turn on native vertical tabs for the sidebar layout, and add SuperchargeNavigation for the workspaces, command bar, and keyboard hints that made Zen feel good in the first place.

For a feature-by-feature comparison of the two paths rather than the install mechanics, see the Zen vs Chrome extensions breakdown. For the broader workspace question, does Chrome have workspaces? covers what native Chrome can and cannot do.