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Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

147.0.1 Firefox Release

January 16, 2026

Version 147.0.1, first offered to Release channel users on January 16, 2026

Fixed

  • Fixed compatibility problems with websites that use the new Compression Dictionaries technology, such as ChatGPT, by temporarily disabling the feature. (Bug 2010712)

  • Fixed an issue where an unnecessary empty directory was created on Linux systems. (Bug 2001887)

  • Fixed an issue where time formats could cause certain websites to display incorrectly. (Bug 2010411)

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