27th of March marks ten years of surfing the web with Waterfox 🌊

I am proud to announce the decennial release of Waterfox. It has been an incredible journey, with peaks and troughs at every stage. What started out as a side project has become something more than I could have ever dreamed of.

Waterfox now has an office, we are based just off Brick Lane, London. We also have a new employee - please meet Adam! He has been helping out the project over the last few months and is the one who implemented support for Chrome extensions.

I will be posting on my personal site about the adventure over the last decade (so keep your eyes peeled!) - we are only set to grow from here. I really hope everyone has enjoyed being a part of this journey - here is to another ten years 🍾

📝 What’s new in Waterfox 2021.03

View Changes


  • Support for detecting dark mode on operating systems such as Windows 10 and Linux.
  • Implementation and activation of PerformanceObserver. Helps load websites such as GitHub.
  • Experimental support for CSS Grid layout.

✔ Fixed

  • Fixed an issue causing YouTube 360 videos to crash.
  • Fixes for the Fetch API.

ℹ️ Changed

  • Uplift to newer ANGLE (Gecko 87). This improves WebGL performance.
  • Security patches from latest ESR.
  • Removal of Polly, due to confusion on how to use.
  • Improved media codecs for better performance and security.

❌ Unresolved

  • macOS dark mode detection does not work.

Contributors for this release

† As the differences between Classic and later Firefox versions grow, we are doing our best to patch the security advisories as we think apply to Classic. Not all patches apply cleanly or apply at all - but our better judgement is used. You can view unapplied security patches here.

🏆 Support Waterfox

If you’d really like to help Waterfox out, please consider using the default search (Bing) with adblock disabled on it, it would be such a huge show of support! The default search is fairly privacy friendly.