4.2.1: Coherence X

: Improved support for importing extensions and profiles from multiple Chromium browsers (beyond just standard Chrome), resolving common errors when Chrome was not the primary system browser. Key Features and Fixes Feature Area Specific Improvement App Signature

: Users of the 4.x series are often eligible for discounted upgrades to X5, which introduces a redesigned interface for macOS 26 ("Tahoe") and support for Ungoogled Chromium . Coherence X 4.2.1

Resolved an issue where existing tabs were lost during the app update process; improved behavior when opening new tabs within an isolated app. : Improved support for importing extensions and profiles

While Coherence X 4.2.1 addressed stability for macOS versions like Big Sur and Monterey, it has since been superseded by (released September 2025). While Coherence X 4

Improved URL input handling to automatically skip unnecessary steps (like extension import) if no relevant data is detected.

Significant rewrite of the icon generation code to reduce errors when pulling favicons from complex URLs.

: The Coherence creation tool was updated to allow relaunching after being closed without requiring a full application restart.