For years, the vast majority of us have defaulted to Google Chrome for browsing the web. But due to concerns over data harvesting and high consumption of system memory, I finally started looking for a true alternative.

After trying out several alternatives, I finally stumbled upon Zen browser, a relatively new, fully open-source browser built on the robust foundation of Firefox. With its stunning, modern user interface, built-in productivity features like Workspace and Split View and core commitment to user privacy, Zen ticks all the boxes for me.

Privacy and Gecko rendering engine

Stands out in the Chromium world

I was tired of the whole ‘open-source Chromium’ scene. Browsers like Brave are fantastic, but ultimately, they are still built on the Chromium base, which is primarily controlled by Google.

Zen, however, is a fully FOSS project. This means the code is auditable, transparent, and driven by community needs. Besides, it’s built on the Mozilla Gecko engine, and that’s the biggest advantage.

It’s the same rendering engine that powers Firefox. This is what truly sets it apart from the dozens of open-source Chromium clones. If nearly every major browser (Chrome, Edge, Vivaldi, Opera) uses Chromium, the web effectively becomes a Chromium monopoly.

While Chrome is often fast, its high resource consumption is infamous. Gecko had made great strides in recent years, often beating Chromium in performance while managing system memory far more efficiently.

A beautiful interface to work with

Even better than Chrome’s Material makeover

Zen doesn’t look like any other browser I have tried in the past. Chrome’s design, which hasn’t fundamentally changed in over a decade, feels dated and cluttered in comparison.

The key to this is the vertical tab sidebar. Moving tabs from the top of the screen to the left side immediately maximizes the precious vertical space where 95% of web content actually lives. This isn’t just a gimmick; it’s a massive productivity hack.

Zen is the customization king. I can swap the entire color scheme with a few clicks, tie a unique gradient accent color to each workspace, and even dive into the advanced settings and tweak browser layout.

Zen has also nailed little things. This is where the polish shines, though. The iconography is clean and the animations – like the smooth transition when you switch Workspaces, open Split View, or collapse the sidebar into its favicon-only compact mode – are fluid and satisfying.

In short, while Chrome’s UI is functional, Zen’s interface is dynamic and highly refined.

A robust extension support

Thanks to Firefox

One of the most immediate concerns when switching from Chrome is losing access to that massive library of extensions. After all, extensions are what turn a simple browser into a personalized, powerful tool.

Thankfully, because Zen browser is built on the Firefox core, the transition to a new extension ecosystem was seamless.

Zen gives me access to the entire Mozilla Add-ons library. This library is mature, vast, and most importantly, it still maintains a strong focus on privacy and powerful functionality.

Every crucial extension I needed – my password manager, Evernote, and others are available in the Add-ons store. I didn’t have to rebuild my workflow from scratch. In short, the extension support in Zen wasn’t a downgrade or a painful transition.

Packed with productivity tools

Thoughtfully implemented

This is where the Zen browser stops being a private Chrome rival and starts being a superior tool. Zen Workspaces is an excellent tool for power users. I can have a workspace for Social, Banks, Client, and more and keep my tabs organized and tidy.

I can also take advantage of the split view and view two tabs side-by-side for research or during shopping. Yes, Chrome has pinned tabs, but Zen takes it further. I can designate a tab as Essential, meaning it automatically loads in a specific Workspace and can’t be accidently closed.

This ensures my core tools like Asana, Notion, Gmail, and X are always where I need them. There is also a built-in screenshot tool (where I can save the current window or the entire page with a single click), excellent tab management, customizable keyboard shortcuts, and more.

Overall, every single feature in Zen is focused on making the web less distracting. The reader mode is quite robust as well. I can remove annoying elements with a single click and customize the webpage with different font types and backgrounds.

The Chrome killer

While Chrome offered unmatched familiarity, Zen offers something far more valuable: control and calm. Its open-source nature provides the transparency and security that Chrome simply can’t match, and its productivity-focused features, from Workspaces to the minimalist UI, have proven that a browser can be both powerful and peaceful.

Now, I can’t wait to see Zen’s arrival on the mobile platforms. The current workaround with Firefox feels clunky. Instead, like Chrome, I would prefer the same native experience on the small screen. If Zen doesn’t work for you, check out these Firefox-based browsers for your workflow.