Zen Browser
Zen Browser Team • Web Browser
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Zen Browser is a privacy-focused, open-source web browser built on Mozilla Firefox, offering users a secure and customizable browsing experience. It emphasizes privacy by blocking trackers, ads, and ensuring your data isn’t collected.
With version 1.21.14b, Zen Browser continues to deliver a streamlined interface while maintaining robust privacy protections. This release updates the underlying Firefox engine to version 1.21.14b and adds support for FFmpeg 63, enhancing media compatibility.
In This Post
Quick Start & Pro Tips
Accessing Advanced Configuration (about:config)
- Open Zen Browser.
- In the address bar, type about:config and press Enter.
- Click “Accept the Risk and Continue” on the warning page.
- Use the search bar to find specific flags and toggle their values (e.g., toolkit.tabbox.switchByScrolling).
How This Would Help: This panel provides granular control over numerous browser settings, allowing power users to fine-tune appearance, behavior, and experimental features for optimized performance or specific workflows. Incorrect modifications can affect stability.
Managing Container Tabs for Isolated Sessions
- Navigate to Settings > General > Container Tabs.
- From here, you can manage existing containers, add new ones, or customize them with different colors and icons.
- To open a link or tab in a specific container, right-click the “New Tab” button or an existing tab/link, then select “Open in New Container Tab” and choose your desired container.
How This Would Help: Container tabs isolate browsing sessions, preventing websites from tracking your activity across different contexts. This is crucial for privacy and managing multiple logins for the same service (e.g., work and personal email) within a single browser instance.
Customizing with Zen Mods
- Open Zen Browser.
- Go to Settings > Zen Mods.
- Browse the available community-created mods and themes.
- Select and install mods to enhance functionality or change the browser’s visual appearance.
How This Would Help: Zen Mods allow users to extend the browser’s capabilities and personalize its aesthetic beyond default options. This fosters a unique browsing environment tailored to individual preferences and needs, leveraging community contributions.
Download Zen Browser
File size: 111.0 MB
OS support: Windows
Windows
Download Zen Browser 1.23 for Windows – Installer (Exe)
Download Zen Browser 1.23 for Windows – Installer ARM64 (Exe)
Other
What’s New in Current Version
- Updated Firefox base to 158.0
- Added a –space option to the command line interface
- Library displays Open in Folder and download speed when hovering over toolbar icon
- Improved PDF rendering, accessibility, and printing on Linux and macOS
- Fixed various animation, address bar, and UI performance issues
- Fixed Library media tab requesting OneDrive cloud downloads
- Resolved memory leak bugs and crashes related to loading website favicons
- Smoother scrolling that no longer rounds positions to whole screen pixels
Changes in 1.23b (2026-10-03)
- Introducing Library for better organization of history, media, downloads, and spaces.
- Sidebar can now be resized even when hidden and auto-hides if too small.
- Updated to Firefox 157.0.
- WebRTC video calls now support hardware AV1 decoding.
- Significant performance improvements on startup and when opening new windows with many tabs.
- Fixed HDR video playback issues on Windows.
- Improved audio and video synchronization during playback speed changes.
- Fixed full-screen video issues where the Windows taskbar remained visible.
Changes in 1.22.2b (2026-09-17)
- Updated engine to Firefox 156.0
- Added macOS startup integration in Settings
- Added new command bar actions: Expand view, New space, Reopen closed tab, Duplicate tab, Reset pinned tab
- Zen built-in PDF viewer now starts up to 45% faster
- Improved memory and CPU usage when displaying large JPEG images
- Added hardware H264 decoding for WebRTC video calls on Windows ARM64
- Improved drag-and-drop interactions and native behavior on macOS
- Fixed various playback, picture-in-picture subtitle, taskbar, and DNS over HTTPS issues
Changes in 1.21.14b (2026-08-14)
- Update Firefox version to 153.0.4
- Added support for FFmpeg 63
- Fixed feature callouts not using native panels (#14912)
- Fixed hang when using the same tab in 2 windows with different containers (#14905)
- Other bug fixes and improvements
Tech Specs
| Software Name | Zen Browser |
|---|---|
| Version | 1.23.3b |
| License | Open Source |
| File Size | 111.0 MB |
| OS Support | Windows |
| Language | Multilingual |
| Developer | Zen Team |
| Homepage | https://zen-browser.app/ |
| Changelogurl | https://github.com/zen-browser/desktop/releases |
| Last Updated | October 18, 2026 |
Key Features
- Privacy-First Design: Built with privacy at its core, Zen Browser automatically blocks trackers and ads while ensuring no user data is collected or sold to third parties.
- Firefox-Based Engine: Leveraging Mozilla Firefox’s robust and secure codebase, Zen Browser inherits Firefox’s strong security features and extensive compatibility with web standards.
- Customizable Interface: Offers flexible theming and layout options, allowing users to tailor the browser’s appearance and functionality to their specific preferences and workflow needs.
- Container Support: Provides advanced container tabs functionality, enabling users to isolate different browsing contexts for enhanced privacy and better organization of online activities.
- Open Source Foundation: As an open-source project, Zen Browser benefits from community transparency, collaborative development, and the ability for users to audit its privacy-focused code.
Hardware Requirements
Minimum
- OS: Windows, macOS, Linux
Setup Instructions
Installation Steps
- Click the download button above to get the installer for your operating system
- Locate the downloaded file and double-click to run the installer
- Follow the on-screen installation wizard to complete setup
Compatibility: Compatible with Windows 7 and later versions
Common Issues & Fixes
- Issue: Installation fails → Solution: Run as administrator
Questions & Answers
How do I use the Split View feature in Zen Browser?
To use Split View, select multiple tabs by holding the Ctrl key and left-clicking them, or by holding the Shift key and clicking two tabs to select all in between. Then, right-click a selected tab and choose Split x Tabs. You can change the view mode using the [|] button in the top address bar.
Can I switch tabs by scrolling in Zen Browser?
Yes, you can enable this feature. Open the about:config page in Zen Browser, then search for toolkit.tabbox.switchByScrolling. Toggle this setting to true by double-clicking it. After enabling, you can hover your mouse over the tab bar and scroll to switch tabs.
Does Zen Browser support DRM-protected content?
Zen Browser may have incompatibility with DRM-protected content from services like Netflix, Disney+, Amazon Prime Video, Apple Music, and Google Play Movies & TV. For such content, it is recommended to use a browser with a Widevine license (like Mozilla Firefox) or the service’s native desktop application.
How can I support the development of Zen Browser?
You can support Zen Browser’s development through official donation platforms. Visit their Patreon at https://www.patreon.com/zen_browser for recurring donations or Ko-fi at https://ko-fi.com/zen_browser for one-time contributions.
How do I know Zen Browser is safe to use?
Zen Browser is designed with a strong focus on security and privacy. Its codebase is derived from Mozilla Firefox, a well-known open-source project. Users can review the source code on GitHub for verification, and regular updates and community engagement further contribute to its security.
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