WA

Waterfox Classic

Waterfox Classic is a legacy web browser based on an older Gecko engine supporting legacy XUL and XPCOM add-ons removed from Firefox since version 57. It is open-source and focuses on privacy and user control, with partial maintenance from Waterfox and Firefox ESR patches.
Latest: 2022.11
Last checked: Jun 9, 2026 12:10am
Rank: 7238/15140
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Overview

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License: MPL 2.0Winget: Available

Version & Lifecycle

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Current: 2022.11 Avg cadence: Infrequent, partial maintenance with fixes and patches from Waterfox and Firefox ESR

Top Contributors

Top sitewide contributors:

  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

Community Notes

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Release Notes & Updates

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Avg cadence:
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Also known as

Other names people use for this app — helps search and matching.

waterfoxclassicwaterfox waterfoxclassic

Packaging Notes

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Legacy browser based on older Gecko engine supporting XUL and XPCOM add-ons; partially maintained separately from main Waterfox

Notes

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Has multiple unpatched security advisories; development separated from main Waterfox due to numerous ESR differences.