Comparison
Zen Browser vs LibreWolf
Zen Browser and LibreWolf are both Firefox-based and both free and open source — but they optimise for different things. Zen chases a reimagined, customisable interface; LibreWolf chases hardened, privacy-first defaults with telemetry stripped out. Here's how they line up.
Choose Zen Browser if
Choose Zen if the browser's interface matters most — vertical tabs, workspaces, split view and heavy customisation — while keeping Firefox's engine and reasonable privacy.
Zen Browser Trust Report ›Choose LibreWolf if
Choose LibreWolf if privacy defaults matter most: telemetry removed, tracking-resistant settings and uBlock Origin out of the box, with a plain, familiar Firefox interface.
LibreWolf Trust Report ›| Foundation | ||
| Engine | Gecko Firefox-based | Gecko Firefox fork |
| License | MPL-2.0 | MPL-2.0 |
| Focus | Interface Design & workflow | Hardening Privacy defaults |
| Privacy & data | ||
| Telemetry | Minimal | Removed No telemetry by design |
| Hardened defaults | Partial | Yes uBlock Origin bundled, RFP |
| Extensions | Firefox add-ons | Firefox add-ons |
| Experience | ||
| Vertical tabs · workspaces | Yes Core | — |
| Split view | Yes | — |
| Price | Free | Free |
The bottom line
Choose Zen Browser if
Choose Zen if the browser's interface matters most — vertical tabs, workspaces, split view and heavy customisation — while keeping Firefox's engine and reasonable privacy.
Choose LibreWolf if
Choose LibreWolf if privacy defaults matter most: telemetry removed, tracking-resistant settings and uBlock Origin out of the box, with a plain, familiar Firefox interface.
Frequently asked questions
What is the difference between Zen Browser and LibreWolf?
Zen Browser and LibreWolf are both Firefox-based and both free and open source — but they optimise for different things. Zen chases a reimagined, customisable interface; LibreWolf chases hardened, privacy-first defaults with telemetry stripped out. Here's how they line up. In short: choose Zen Browser if choose Zen if the browser's interface matters most — vertical tabs, workspaces, split view and heavy customisation — while keeping Firefox's engine and reasonable privacy. Choose LibreWolf if choose LibreWolf if privacy defaults matter most: telemetry removed, tracking-resistant settings and uBlock Origin out of the box, with a plain, familiar Firefox interface.
Is Zen Browser or LibreWolf cheaper?
At our last review, Zen Browser is listed at “Free · open source” and LibreWolf at “Free”. Pricing is recorded as published by each developer and re-checked when the report is refreshed.
Which of Zen Browser and LibreWolf supports more platforms?
Zen Browser runs on macOS · Windows · Linux. LibreWolf runs on Windows 10+ · macOS 10.15+ · Linux · OpenBSD.
Are Zen Browser and LibreWolf both safe to use?
Both carry an independent Altapp Trust Report. Zen Browser: 7/9 of nine checks verified, last full review Jul 19, 2026. LibreWolf: 7/9 of nine checks verified, last full review Jul 17, 2026. Each covers source verification, data and permissions, and known risks. Altapp publishes no score of its own — the count is a tally of what could be independently confirmed.