Learn how Waterfox and Zen Browser differ in their key features, development activity, technology stack and community adoption, so you can decide which of these tools is best for you.
Last 30 days
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Last 30 days
Last commit
Repository age
Version
License
Repository

Both Waterfox and Zen Browser have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, growth, activity, maturity, licensing and features when making your decision.
Zen Browser significantly outpaces Waterfox in community adoption with 44,434 stars compared to 6,288 stars on GitHub. This 7.1x difference suggests Zen Browser has a much larger and more active community. In terms of developer contributions, Zen Browser has 1,747 forks, indicating strong developer engagement.
Waterfox is growing faster, adding 161 stars in the last 30 days (+2.6%) against adding 498 stars for Zen Browser (+1.1%). Waterfox is the smaller project of the two, so it is closing the gap rather than extending a lead.
Both projects show recent activity, with Waterfox last updated 2 days ago and Zen Browser 7 hours ago.
Waterfox has been in development longer, starting 12 years ago, compared to Zen Browser which began 2 years ago. This 9.6-year head start suggests Waterfox may have more mature features and established processes.
Zen Browser is licensed under MPL-2.0, while Waterfox's license terms are not publicly specified.
Zen Browser extends into Security & Privacy, Web Browsers.