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XULRunner

XULRunner is a discontinued runtime environment for developing and running standalone XUL + XPCOM applications using the Mozilla platform.
Latest: 41.0.2
Last checked: Jan 13, 2026 11:05pm
Rank: 8878/15140
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Overview

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License: MPLWinget: Available

Version & Lifecycle

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Current: 41.0.2 Oldest supported: 1.8 Predicted EOL: 2015-07-01 Avg cadence: discontinued

Top Contributors

Top sitewide contributors:

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

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Release Notes & Updates

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XULRunner

Packaging Notes

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Produces extension XPIs and xulapp installers; uses application.ini, chrome manifest, and prefs.js for configuration

Notes

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Development stopped in July 2015. Firefox and Thunderbird from version 3.0 include a private XULRunner. XULRunner apps can still run via Firefox with -app argument.