$0
Price
Free, open-source Firefox fork
Report
Should I Use Zen Browser?
Beautifully designed, privacy-focused, and packed with features.
Depends
DependsGreat free pick for privacy-minded individuals and ex-Arc power users who want a modern Firefox experience.
Free Arc-style Firefox fork enthusiasts love; shaky CVE record and one-dev team make it risky for anything work-critical.
Confidence: Medium
Yes
Free tier
Donation-funded, no paid tiers found
3
Public CVEs
2026, including one HIGH severity
1 lead dev
Team
'Zen by Mauro' per FLOSS Fund listing
Value for money
5
Free, open source, no paid gates
Ease of use
4
Praised UX; familiar Firefox base
Feature depth
4
Workspaces, compact mode, mod ecosystem
Support quality
2
Community GitHub support, donation-funded
Security posture
2
Three 2026 CVEs, past backdoor controversy
Pros
Cons
Gotchas
- highUpdate past 1.19.9b immediately; older versions ship a HIGH-severity updater flaw⁶
- mediumDonation-funded solo project; long-term maintenance depends on one developer10
- mediumSecurity advisories live on GitHub; no formal enterprise security page
- lowGuess: Firefox-based means no Chrome extensions; some Chromium-only sites may glitch¹
Best for
- Ex-Arc power users
- Privacy-focused personal browsing
- Firefox users wanting a modern UI
- Tinkerers who customize their setup
Not for
- Corporate fleets needing managed browsers and vendor SLAs
- Regulated teams with strict browser compliance requirements
- Anyone wanting official paid support with accountability
Pricing
Zen Browser
$0
- Full browser
- Open source
- Donation-supported
Security
Three 2026 CVEs including one HIGH severity; patch to latest before daily driving it.
- CVE-2026-41431 — HIGH severity MAR updater flawAffects Zen prior to 1.19.9b; updater vulnerability rated HIGH.⁶
- CVE-2026-44658 — URL validation vulnerabilityURL validation flaw disclosed in 2026.⁷
- CVE-2026-45150 — XSS vulnerabilityCross-site scripting vulnerability in Zen Browser.⁸
- Default-enabled 'backdoor' controversy (2025)HN discussion of a default-on feature that clashed with Zen's privacy marketing.⁹
What users say
Enthusiasts, especially ex-Arc and ex-Brave users, praise the design and workspaces, while Reddit threads show an engaged but niche community.
“I've officially moved from Brave to Zen Bro…”
“I still love Zen Browser. Exactly the right mix…”
“Other than that, Chrome is not an Option I find”
Alternatives
Compare Zen Browser with each alternative.
Firefox
Same engine, mature security team, full mobile sync
Brave
Privacy-focused Chromium with larger team and track record
Zen Browser vs BraveVivaldi
Deeply customizable, company-backed, stable release cadence
Full analysis
Based on 30+ public sources: reviews, Reddit threads, CVE databases, and official docs.
Sources
- Zen Browser - Wikipediaen.wikipedia.orgofficial
- 10 Best Arc Browser Alternatives In 2026kosmik.appreview
- Zen Browser vs Brave (2026)supasidebar.comreview
review
review
- CVE Record: CVE-2026-41431cve.orgsecurity
- CVE-2026-44658: Zen Browser URL Validation Vulnerabilitysentinelone.comsecurity
- CVE-2026-45150: Zen Browser XSS Vulnerabilitysentinelone.comsecurity
- Zen browser had a backdoor enabled by defaultnews.ycombinator.comnews
- Zen by Mauro - FLOSS Funddir.floss.fundofficial
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