Horizontal tabs work fine until the moment they don’t, which usually happens somewhere between page 20 and page 30, when favicons shrink to unreadable stubs and Cmd+F on a tab title stops working. Vertical tabs solve that by giving each open page a full-width row on a collapsible sidebar. Chrome added its own vertical layout behind a settings flag, and the difference after a week is loud enough that going back feels off. The catch: not every browser does it well, and a few do it badly enough to make the feature useless.
We tested 8 desktop browsers with real vertical tab support, ran each through a typical research day with 40 to 80 open tabs, and scored them on visible page count, keyboard nav, tab grouping, memory footprint, and how easy it was to hide or collapse the sidebar when a video needed the width back. This is our shortlist of the best browsers with vertical tabs for Windows, macOS, and Linux.
What to look for in a vertical tab browser
The sidebar is the whole point, so a few specifics matter more than the shiny features.
- Collapsible sidebar with a keyboard shortcut, not a mouse-only affordance.
- Real tab groups or workspaces that survive a restart.
- Tab hover previews for pages whose title alone doesn’t identify them.
- A visible unread or activity indicator on background tabs.
- Optional favicon-only compact mode for screen-narrow situations.
- Sync across devices, so the sidebar looks the same on a laptop and a desktop.
Quick comparison
| Browser | Best for | Platforms | Free plan | Starting price | Engine |
|---|---|---|---|---|---|
| Vivaldi | Power users who want every knob | Windows, macOS, Linux | Free | Free | Chromium |
| Arc | New-tab workflows and Spaces | Windows, macOS | Free | Free | Chromium |
| Zen Browser | Firefox users who want Arc’s ideas | Windows, macOS, Linux | Free, open-source | Free | Firefox |
| Microsoft Edge | Windows integration with corporate sync | Windows, macOS, Linux | Free | Free | Chromium |
| Sidekick | People whose day is 20 web apps | Windows, macOS, Linux | Free | Pro plans start under $10/mo | Chromium |
| Firefox + Tree Style Tab | Extension-based deep tab trees | Windows, macOS, Linux | Free, open-source | Free | Firefox |
| Opera One | Split-screen browsing with tab islands | Windows, macOS, Linux | Free | Free | Chromium |
| Brave | Privacy defaults with vertical layout | Windows, macOS, Linux | Free, open-source | Free | Chromium |
The apps
1. Vivaldi – best for full control over the sidebar
Vivaldi ships with vertical tabs turned on out of the box, and every part of the tab bar is a preference: width, spacing, favicon-only mode, two-level stacks, tiling groups of tabs into a split view. The Workspaces feature lets a research project, a client account, and a personal set of tabs live in separate sidebars that share one window. Vivaldi for vertical tabs feels like the reference implementation because everything is tunable.
Where it falls short: The preferences screen is dense. New users can spend an afternoon on the settings pane before the browser looks the way they want. Startup memory is heavier than a stock Chromium build.
Pricing:
- Free: Everything, no cap on tabs, no cap on Workspaces
- Paid: None
Platforms: Windows, macOS, Linux
Download: vivaldi.com
Bottom line: The pick for anyone whose tab count regularly passes 50 and who wants the sidebar to behave exactly one way.
2. Arc – best for people who live in the sidebar
Arc puts the URL bar, tabs, downloads, and bookmarks in one left rail called the Command Bar. Tabs group into Spaces, each with its own theme colour and profile, and pinned tabs sit above a scrollable list that auto-archives after 12 hours. The result is a browser that looks nothing like Chrome and feels closer to a file explorer for the web.
Where it falls short: The Browser Company shifted focus to a newer product called Dia in 2025, and Arc updates slowed. The desktop app still ships fixes but no major features are planned. Linux is not supported.
Pricing:
- Free: Everything
- Paid: None
Platforms: Windows, macOS
Download: arc.net
Bottom line: Still the most opinionated take on vertical tabs, but a bet on a browser whose maintenance runway is uncertain.
3. Zen Browser – best open-source Firefox with Arc’s ideas
Zen Browser is a Firefox fork that borrows Arc’s Spaces, compact sidebar, split-view, and tab archiving, then keeps the underlying Firefox engine so extensions work unchanged. The sidebar toggles with Cmd/Ctrl+Alt+S, tabs group into Workspaces that swap on a keyboard shortcut, and the whole thing is Mozilla Public License 2.0.
Where it falls short: The extension model is Firefox WebExtensions, which means a handful of Chrome-only extensions won’t install. First-party mobile is still in beta and sync uses Firefox Accounts, so you have both a Zen and a Mozilla account.
Pricing:
- Free: Everything, open-source
- Paid: None
Platforms: Windows, macOS, Linux
Download: zen-browser.app
Bottom line: The strongest pick for anyone who wants Arc’s shape without giving up Firefox or paying attention to a company’s roadmap.
4. Microsoft Edge – best for Windows shops on managed devices
Microsoft Edge turned vertical tabs on by default in 2024 for enterprise policies and quietly ships one of the more polished implementations. Right-click a tab, pick “Turn on vertical tabs”, and the bar snaps to the left with a search box, favicon-only collapse, and Copilot integration. Tab groups sync across a Microsoft account and survive a machine swap.
Where it falls short: The sidebar isn’t as flexible as Vivaldi’s. Spacing is fixed and the collapse animation can’t be turned off. Copilot pings whether you use it or not, and disabling it takes a Group Policy edit on managed machines.
Pricing:
- Free: Everything
- Paid: None
Platforms: Windows, macOS, Linux
Download: microsoft.com/edge
Bottom line: The default choice for a Windows machine that syncs with Entra ID and needs zero setup.
5. Sidekick – best for people whose browser is really a desktop of web apps
Sidekick treats every SaaS tool as a pinned “Application” that lives on the vertical sidebar with its own workspace, session, and notification badge. Slack, Notion, Linear, and Figma sit next to each other as apps, not tabs, and a Sessions feature saves entire tab sets to swap between clients or projects.
Where it falls short: The free tier caps active Sessions and Applications; heavy multi-account use pushes you to a paid plan. Sidekick’s marketing leans hard on productivity claims, and the browser lags behind Chromium’s version by a few weeks after major upstream releases.
Pricing:
- Free: Basic Sessions and Applications
- Paid: Pro plans start under $10 per month
Platforms: Windows, macOS, Linux
Download: meetsidekick.com
Bottom line: Worth trying if the workday is a rotation between 15 web apps, each with two accounts.
6. Firefox with Tree Style Tab – best for deep tab hierarchies
Firefox does not ship a vertical tab bar of its own, but the Tree Style Tab extension has been in continuous development since 2007 and turns Firefox into the browser with the most powerful tree view on the market. Child tabs indent under their parents, subtrees collapse, and a Bookmarks-like folder metaphor becomes a genuine research workflow.
Where it falls short: The extension needs a small userChrome.css edit to hide the top tab bar completely, which trips up users who never touched Firefox internals. Sync of tab trees across devices is not built in.
Pricing:
- Free: Firefox and Tree Style Tab are open-source
- Paid: None
Platforms: Windows, macOS, Linux
Download: mozilla.org/firefox
Bottom line: Still the most powerful tab tree in any browser, if you’re willing to spend an hour on setup.
7. Opera One – best for split-screen with tab islands
Opera One grouped its sidebar around Tab Islands, which cluster tabs opened from the same source into a bordered group that stays visually distinct. A split-screen mode drops any two tabs side by side inside one window, which pairs well with vertical layout because both tabs stay visible in the sidebar with their own row.
Where it falls short: The Aria AI assistant is prominent and hard to hide. Opera’s parent company has attracted criticism over data-sharing practices that some users flag as a dealbreaker on principle.
Pricing:
- Free: Everything
- Paid: None
Platforms: Windows, macOS, Linux
Download: opera.com/one
Bottom line: Interesting for split-view research sessions; skip if the parent-company controversy matters to you.
8. Brave – best for privacy defaults with vertical tabs turned on
Brave added a vertical tab option in 2024 that sits behind Settings > Appearance > Tabs > Use vertical tabs. The layout is bare compared to Vivaldi or Arc, but it inherits Brave’s built-in ad and tracker blocking, fingerprinting resistance, and the Tor-in-a-tab private window. Sync uses a self-hosted-by-Brave service, and the profile stores nothing about you beyond what the browser needs.
Where it falls short: The vertical layout is a straight list with none of the grouping, splitting, or workspaces the specialists offer. The BAT / Rewards prompts still appear on first run, though they’re easier to dismiss in current builds.
Pricing:
- Free: Everything, open-source
- Paid: None
Platforms: Windows, macOS, Linux
Download: brave.com
Bottom line: The simplest vertical layout that comes with real privacy defaults out of the box.
How to pick the right one
- If you want the most flexible sidebar: Vivaldi.
- If you want the Arc experience on Firefox and Linux: Zen Browser.
- If Arc’s rough edges are acceptable and you’re on macOS or Windows: Arc.
- If your machine is Windows-first and syncs with a work account: Microsoft Edge.
- If the browser is really where your SaaS tools live: Sidekick.
- If you’re already a Firefox loyalist with a specific tree workflow in mind: Firefox with Tree Style Tab.
- If privacy defaults matter more than sidebar features: Brave.
- If side-by-side tab comparison is a daily need: Opera One.
FAQ
Does Chrome have vertical tabs?
Chrome’s vertical layout is behind an experimental flag on desktop (chrome://flags/#side-panel-improved) and behaves as a preview surface rather than a full tab bar. It works, but the browsers listed above ship the feature as a supported default.
Which browser has the best vertical tabs for research?
Vivaldi and Firefox with Tree Style Tab. Vivaldi wins on out-of-the-box polish, Firefox with Tree Style Tab wins if you need deep parent/child trees that survive across days.
Is Arc still being updated?
Yes, but the pace has slowed. The Browser Company is focused on Dia; Arc still receives security fixes and small improvements, and existing users report a stable experience.
Are vertical tabs faster than horizontal tabs?
The layout has no effect on page rendering speed. The productivity gain shows up in tab-switching time and cognitive load once the count passes roughly 25 open pages.
What’s the most memory-efficient browser with vertical tabs?
Brave and Edge tie on cold-boot memory for a moderate tab count. Vivaldi is heaviest because of the number of default UI panels; disabling the ones you don’t use recovers most of the gap.
